-21=6(x-5)-3x

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Solution for -21=6(x-5)-3x equation:


Simplifying
-21 = 6(x + -5) + -3x

Reorder the terms:
-21 = 6(-5 + x) + -3x
-21 = (-5 * 6 + x * 6) + -3x
-21 = (-30 + 6x) + -3x

Combine like terms: 6x + -3x = 3x
-21 = -30 + 3x

Solving
-21 = -30 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
-21 + -3x = -30 + 3x + -3x

Combine like terms: 3x + -3x = 0
-21 + -3x = -30 + 0
-21 + -3x = -30

Add '21' to each side of the equation.
-21 + 21 + -3x = -30 + 21

Combine like terms: -21 + 21 = 0
0 + -3x = -30 + 21
-3x = -30 + 21

Combine like terms: -30 + 21 = -9
-3x = -9

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

Simplifying
x = 3

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