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help!!!!!???????????? (algebra)?
im used to numbers not letters. how do i solve this?-7=y+12 what is y!?!?!
9 Answers
- 9 years agoFavorite Answer
-7 = Y + 12
SUBTRACT 12 ON EACH SIDE
-19 = Y
YOU HAVE TO BALANCE THE EQUATION SO "Y" IS BY ITSELF
- Anonymous9 years ago
Y=-19
- MikeLv 59 years ago
y is a variable. It is a number that makes the equation a true statement. To solve for y, you have to "get y by itself" by performing opposite operations on both sides of the equation.
First step: subtract a 12 from both sides.
-7 - 12 = y + 12 - 12
Second step: Subtract the numbers accordingly.
-19 = y + 0
Therefore, -19 = y.
To check that y is -19, plug it back into the equation.
-7 = y + 12
-7 = -19 + 12
-7 = -7.
This is a true statement, therefore it is the correct solution.
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- 9 years ago
-7=y+12
move y to the left and 7 to the right:
-y = 7+12
-y = 19
Since y cannot be - so we multiply it by - again:
(-) -y = (-) 19
y = -19
OR
Simply move 12 to the right in order to make y the subject
y = -7-12
y = -19
Either way y = -19 :)
- 9 years ago
well think of y as a number and because you don't know y, you need to isolate it in order for you to find the value so...
-7 = y+12
-7-12 =y subtract 12 from y so the right side will be equal to 0 what you do on the right side, you
must also do the same for the left side
-19 = y <----------------that's your answer
hope this helps :)
- Anonymous9 years ago
Switch the 12 over to the other side this becomes
-12 -7 = y
-19=y
When you move something over, it becomes the opposite such as +12 becomes -12 and *12 becomes /12.
- 9 years ago
-19 because if there is a negative plus a positive and the negative is higher it will be negative.