-8-7=7x+20

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Solution for -8-7=7x+20 equation:


Simplifying
-8 + -7 = 7x + 20

Combine like terms: -8 + -7 = -15
-15 = 7x + 20

Reorder the terms:
-15 = 20 + 7x

Solving
-15 = 20 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
-15 + -7x = 20 + 7x + -7x

Combine like terms: 7x + -7x = 0
-15 + -7x = 20 + 0
-15 + -7x = 20

Add '15' to each side of the equation.
-15 + 15 + -7x = 20 + 15

Combine like terms: -15 + 15 = 0
0 + -7x = 20 + 15
-7x = 20 + 15

Combine like terms: 20 + 15 = 35
-7x = 35

Divide each side by '-7'.
x = -5

Simplifying
x = -5

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