-21x+18x=3(-7-2x)

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Solution for -21x+18x=3(-7-2x) equation: 


Simplifying
-21x + 18x = 3(-7 + -2x)

Combine like terms: -21x + 18x = -3x
-3x = 3(-7 + -2x)
-3x = (-7 * 3 + -2x * 3)
-3x = (-21 + -6x)

Solving
-3x = -21 + -6x

Solving for variable 'x'.

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

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

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

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

Divide each side by '3'.
x = -7

Simplifying
x = -7

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