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Need help with a two-step equation?
Alright my algebra teacher was really confusing with teaching us this today, I got completely confused and wasn't able to do two step equations with a variable as the numerator in a fraction. The question I am trying to do is a/3 (the equation) + 4 = 6 as you may or may not know, I have to solve for what the variable equals, but could somebody show me how I could solve this problem?
Sorry if it's a bit confusing, I tried to substitute the / as the bar that separates the numerator and denominator. I remember that my teacher said something about multiplying or dividing by the reciprocal?
And something about Least Common Denominators.
If I remember sorta clearly it was something like you take the fraction and flip it...I just remember from the lesson that he was teaching us something like if you have 1/7+__= 1 and the answer was 7/7, sorry I can't be of much more help.
5 Answers
- 9 years agoFavorite Answer
It's fairly easy my friend
a/3 + 4 = 6 Ok so what you want to do here is isolate the variable, which in this case includes the entire fraction so
a/3 +4 = 6
-4 -4
a/3 = 2 is what you have afterwards and you just multiply the two numbers (3 times 2 = 6) and voila, a=6
- ?Lv 69 years ago
William, these are rather easy. If you have a single fraction involved you simply multiply all terms by the denominator (3).
3(a/3 + 4 = 6)
a+12 = 18
a+12-12= 18-12
a= 6
If you have more than one multiply by the least common denominator of the fractions.
- SuzanLv 59 years ago
a/3 + 4 = 6
a/3 = 6 - 4
a/3 = 2
the opposite of dividing by 3 is multiplying by 3
3a/a = 3(2)
a = 6
- R TLv 79 years ago
Rule 1: If you do something, you have to do it on both sides of the equal sign.
Rule 2: Use opposite operators to undo something
(a/3) +4 = 6
Add -4 to both sides
(a/3) +4 -4 = 6 -4
(a/3) = 2
Multiply by 3 to undo a divide by 3. You have to do it to both sides
a = 6
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- 9 years ago
Ok you typed the equation very strangely. Is the equation a/3 + 4 = 6?
If so:
(a/3 x 3/1) + 4 = 6 (3/1)
a + 4 = 18
-4. -4
a = 14
There you go!
Source(s): I did Algebra last year!
