-3(x+7)=21-5x

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Solution for -3(x+7)=21-5x equation:


Simplifying
-3(x + 7) = 21 + -5x

Reorder the terms:
-3(7 + x) = 21 + -5x
(7 * -3 + x * -3) = 21 + -5x
(-21 + -3x) = 21 + -5x

Solving
-21 + -3x = 21 + -5x

Solving for variable 'x'.

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

Add '5x' to each side of the equation.
-21 + -3x + 5x = 21 + -5x + 5x

Combine like terms: -3x + 5x = 2x
-21 + 2x = 21 + -5x + 5x

Combine like terms: -5x + 5x = 0
-21 + 2x = 21 + 0
-21 + 2x = 21

Add '21' to each side of the equation.
-21 + 21 + 2x = 21 + 21

Combine like terms: -21 + 21 = 0
0 + 2x = 21 + 21
2x = 21 + 21

Combine like terms: 21 + 21 = 42
2x = 42

Divide each side by '2'.
x = 21

Simplifying
x = 21

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