-9y-7=4y+84

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Solution for -9y-7=4y+84 equation:


Simplifying
-9y + -7 = 4y + 84

Reorder the terms:
-7 + -9y = 4y + 84

Reorder the terms:
-7 + -9y = 84 + 4y

Solving
-7 + -9y = 84 + 4y

Solving for variable 'y'.

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

Add '-4y' to each side of the equation.
-7 + -9y + -4y = 84 + 4y + -4y

Combine like terms: -9y + -4y = -13y
-7 + -13y = 84 + 4y + -4y

Combine like terms: 4y + -4y = 0
-7 + -13y = 84 + 0
-7 + -13y = 84

Add '7' to each side of the equation.
-7 + 7 + -13y = 84 + 7

Combine like terms: -7 + 7 = 0
0 + -13y = 84 + 7
-13y = 84 + 7

Combine like terms: 84 + 7 = 91
-13y = 91

Divide each side by '-13'.
y = -7

Simplifying
y = -7

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