12y-(5y+8)=3(y-7)+9

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Solution for 12y-(5y+8)=3(y-7)+9 equation:


Simplifying
12y + -1(5y + 8) = 3(y + -7) + 9

Reorder the terms:
12y + -1(8 + 5y) = 3(y + -7) + 9
12y + (8 * -1 + 5y * -1) = 3(y + -7) + 9
12y + (-8 + -5y) = 3(y + -7) + 9

Reorder the terms:
-8 + 12y + -5y = 3(y + -7) + 9

Combine like terms: 12y + -5y = 7y
-8 + 7y = 3(y + -7) + 9

Reorder the terms:
-8 + 7y = 3(-7 + y) + 9
-8 + 7y = (-7 * 3 + y * 3) + 9
-8 + 7y = (-21 + 3y) + 9

Reorder the terms:
-8 + 7y = -21 + 9 + 3y

Combine like terms: -21 + 9 = -12
-8 + 7y = -12 + 3y

Solving
-8 + 7y = -12 + 3y

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '-3y' to each side of the equation.
-8 + 7y + -3y = -12 + 3y + -3y

Combine like terms: 7y + -3y = 4y
-8 + 4y = -12 + 3y + -3y

Combine like terms: 3y + -3y = 0
-8 + 4y = -12 + 0
-8 + 4y = -12

Add '8' to each side of the equation.
-8 + 8 + 4y = -12 + 8

Combine like terms: -8 + 8 = 0
0 + 4y = -12 + 8
4y = -12 + 8

Combine like terms: -12 + 8 = -4
4y = -4

Divide each side by '4'.
y = -1

Simplifying
y = -1

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