5x-2(-x-7)=21

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Solution for 5x-2(-x-7)=21 equation:


Simplifying
5x + -2(-1x + -7) = 21

Reorder the terms:
5x + -2(-7 + -1x) = 21
5x + (-7 * -2 + -1x * -2) = 21
5x + (14 + 2x) = 21

Reorder the terms:
14 + 5x + 2x = 21

Combine like terms: 5x + 2x = 7x
14 + 7x = 21

Solving
14 + 7x = 21

Solving for variable 'x'.

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

Add '-14' to each side of the equation.
14 + -14 + 7x = 21 + -14

Combine like terms: 14 + -14 = 0
0 + 7x = 21 + -14
7x = 21 + -14

Combine like terms: 21 + -14 = 7
7x = 7

Divide each side by '7'.
x = 1

Simplifying
x = 1

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