20-(8x-7)=91

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Solution for 20-(8x-7)=91 equation:


Simplifying
20 + -1(8x + -7) = 91

Reorder the terms:
20 + -1(-7 + 8x) = 91
20 + (-7 * -1 + 8x * -1) = 91
20 + (7 + -8x) = 91

Combine like terms: 20 + 7 = 27
27 + -8x = 91

Solving
27 + -8x = 91

Solving for variable 'x'.

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

Add '-27' to each side of the equation.
27 + -27 + -8x = 91 + -27

Combine like terms: 27 + -27 = 0
0 + -8x = 91 + -27
-8x = 91 + -27

Combine like terms: 91 + -27 = 64
-8x = 64

Divide each side by '-8'.
x = -8

Simplifying
x = -8

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