[x+7]=[91-x]

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Solution for [x+7]=[91-x] equation:


Simplifying
[x + 7] = [91 + -1x]

Reorder the terms:
[7 + x] = [91 + -1x]

Remove brackets around [7 + x]
7 + x = [91 + -1x]

Remove brackets around [91 + -1x]
7 + x = 91 + -1x

Solving
7 + x = 91 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
7 + x + x = 91 + -1x + x

Combine like terms: x + x = 2x
7 + 2x = 91 + -1x + x

Combine like terms: -1x + x = 0
7 + 2x = 91 + 0
7 + 2x = 91

Add '-7' to each side of the equation.
7 + -7 + 2x = 91 + -7

Combine like terms: 7 + -7 = 0
0 + 2x = 91 + -7
2x = 91 + -7

Combine like terms: 91 + -7 = 84
2x = 84

Divide each side by '2'.
x = 42

Simplifying
x = 42

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