4-8y-7y=139

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Solution for 4-8y-7y=139 equation: 


Simplifying
4 + -8y + -7y = 139

Combine like terms: -8y + -7y = -15y
4 + -15y = 139

Solving
4 + -15y = 139

Solving for variable 'y'.

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

Add '-4' to each side of the equation.
4 + -4 + -15y = 139 + -4

Combine like terms: 4 + -4 = 0
0 + -15y = 139 + -4
-15y = 139 + -4

Combine like terms: 139 + -4 = 135
-15y = 135

Divide each side by '-15'.
y = -9

Simplifying
y = -9

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