91=7(-7+x)

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Solution for 91=7(-7+x) equation:


Simplifying
91 = 7(-7 + x)
91 = (-7 * 7 + x * 7)
91 = (-49 + 7x)

Solving
91 = -49 + 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.
91 + -7x = -49 + 7x + -7x

Combine like terms: 7x + -7x = 0
91 + -7x = -49 + 0
91 + -7x = -49

Add '-91' to each side of the equation.
91 + -91 + -7x = -49 + -91

Combine like terms: 91 + -91 = 0
0 + -7x = -49 + -91
-7x = -49 + -91

Combine like terms: -49 + -91 = -140
-7x = -140

Divide each side by '-7'.
x = 20

Simplifying
x = 20

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