3x-2(2x-5)-2(x+2)=-21

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Solution for 3x-2(2x-5)-2(x+2)=-21 equation:


Simplifying
3x + -2(2x + -5) + -2(x + 2) = -21

Reorder the terms:
3x + -2(-5 + 2x) + -2(x + 2) = -21
3x + (-5 * -2 + 2x * -2) + -2(x + 2) = -21
3x + (10 + -4x) + -2(x + 2) = -21

Reorder the terms:
3x + 10 + -4x + -2(2 + x) = -21
3x + 10 + -4x + (2 * -2 + x * -2) = -21
3x + 10 + -4x + (-4 + -2x) = -21

Reorder the terms:
10 + -4 + 3x + -4x + -2x = -21

Combine like terms: 10 + -4 = 6
6 + 3x + -4x + -2x = -21

Combine like terms: 3x + -4x = -1x
6 + -1x + -2x = -21

Combine like terms: -1x + -2x = -3x
6 + -3x = -21

Solving
6 + -3x = -21

Solving for variable 'x'.

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

Add '-6' to each side of the equation.
6 + -6 + -3x = -21 + -6

Combine like terms: 6 + -6 = 0
0 + -3x = -21 + -6
-3x = -21 + -6

Combine like terms: -21 + -6 = -27
-3x = -27

Divide each side by '-3'.
x = 9

Simplifying
x = 9

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