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HELP. MATH HELP! HOMEWORK HELP :/?
i finished my homework,
but i got stuck on two problems :/
help please?
its two problems thats it .
1. -14x-23-15x=151
2. 24x+ 81 + 7x=19
these give me headaches gahhh help?
ohhh ++ on this question i did the right process
but when i checked it i got the wrong answer?
46x -13-51x= -64
on the bottom one the third question i ment to put,
48x-13-51x=-64
on the bottom one the third question i ment to put,
48x-13-51x=-64
on the bottom one the third question i ment to put,
48x-13-51x=-64
9 Answers
- ?Lv 71 decade agoFavorite Answer
I'll show you how to do one .. the rest will be similar.
-14x-23-15x=151
First, rewrite it to be easier to work with
-14x + (-23) + (-15x) = 151
Now, combine like items
-14x + (-15x)
-29x + (-23) = 151
Now, isolate the variable. Remember, what you do to ONE side of the equal sign do to the other
-29x + (-23) - (-23) = 151 - (-21)
-29x = 151 + 21
-29x = 172
Now, divide both sides by -29 for your answer
You're ready to do the rest on your own!
- melislynLv 51 decade ago
1. -14x-23-15x=151
-->rewrite
-14x + -23 + -15x = 151
-->combine like terms
-29x + -23 = 151
-->add 23 to both sides
-29x + -23 + 23 = 151 + 23
-29x = 174
-->divide both sides by -29
-29x/-29 = 174/-29
x = -6
2. 24x + 81 + 7x = 19
-->combine like terms
31x + 81 = 19
-->add -81 to both sides
31x + 81 + -81 = 19 + -81
31x = 62
-->divide both sides by 31
31x/31 = 62/31
x = 2
48x - 13 - 51x = -64
48x + -13 + -51x = -64
-3x + -13 = -64
-3x + -13 + 13 = -64 + 13
-3x = -51
-3x/-3 = -51/-3
x = 17
- Emily DLv 51 decade ago
-14x - 23 - 15x = 151
-29x - 23 = 151
+ 23 +23
-29x = 174
x= -6
24x + 81 + 7x = 19
31x + 81 = 19
- 81 -81
31x = -62
x = -2
48x - 13 -51x = -64
-3x - 13 = -64
+13 + 13
-3x = -51
x = 17
- 1 decade ago
1. -14x-23-15x=151 -29x-23=151 next, add 23 to both sides, -29x=174, then divide 174 by 29 to get the answer.
2. 24x +81 +7x=19 First, add the x together. 31x+81=19 Then subtract 81 from 19 to get a negative number. 31x=-62. Last, divide -62 by 31 to get your answer!! Good Luck! :)
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- 1 decade ago
lets do the steps for you
u have your unknown (x)
the first thing you wanna do is group em
therefore -14-15 becomes -29x
then put 23 on the other side by adding it to 151
this becomes 174
divide this by -29 and you get -6
to check it we do (-29 * -6) - 23 = ??
= 151
both sides are the same therefore its correct
------------------------------------------------------------------------
followin the same steps.. theres 31x = -62 (because 19 - 81)
divide both sides.. and you get x = -2
to check: 31(-2) = -62
= -62
both sides are the same
--------------------------------------------------------------------
48 - 51 = -3
-64 + 13 = -51
divide both sides by -3 and you get x=17
to check -3(17) -13 = -64
= -64
both sides are the same (y)
--------------------------------------------------------------------
hopefully that helps.. you probably didnt collect like terms correctly.. look out for that next time :P
- Anonymous1 decade ago
1) x= -6
2) x= -2
3) x= 17
- 1 decade ago
1. -14x-23-15x=151
-29x-23=151
-29x=23+151
-29x=174
-(29x)/(-29)=(174)/(-29)
x=(174)/(-29)
x=-6
2. 24x+81+7x=19
31x+81=19
31x=-81+19
31x=-62
(31x)/(31)=-(62)/(31)
x=-(62)/(31)
x=-2
Source(s): me