2x+7x-1=-2(-10-x)

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Solution for 2x+7x-1=-2(-10-x) equation:


Simplifying
2x + 7x + -1 = -2(-10 + -1x)

Reorder the terms:
-1 + 2x + 7x = -2(-10 + -1x)

Combine like terms: 2x + 7x = 9x
-1 + 9x = -2(-10 + -1x)
-1 + 9x = (-10 * -2 + -1x * -2)
-1 + 9x = (20 + 2x)

Solving
-1 + 9x = 20 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
-1 + 9x + -2x = 20 + 2x + -2x

Combine like terms: 9x + -2x = 7x
-1 + 7x = 20 + 2x + -2x

Combine like terms: 2x + -2x = 0
-1 + 7x = 20 + 0
-1 + 7x = 20

Add '1' to each side of the equation.
-1 + 1 + 7x = 20 + 1

Combine like terms: -1 + 1 = 0
0 + 7x = 20 + 1
7x = 20 + 1

Combine like terms: 20 + 1 = 21
7x = 21

Divide each side by '7'.
x = 3

Simplifying
x = 3

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