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

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


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

Reorder the terms:
-7(-7 + x) = 21 + -3x
(-7 * -7 + x * -7) = 21 + -3x
(49 + -7x) = 21 + -3x

Solving
49 + -7x = 21 + -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.
49 + -7x + 3x = 21 + -3x + 3x

Combine like terms: -7x + 3x = -4x
49 + -4x = 21 + -3x + 3x

Combine like terms: -3x + 3x = 0
49 + -4x = 21 + 0
49 + -4x = 21

Add '-49' to each side of the equation.
49 + -49 + -4x = 21 + -49

Combine like terms: 49 + -49 = 0
0 + -4x = 21 + -49
-4x = 21 + -49

Combine like terms: 21 + -49 = -28
-4x = -28

Divide each side by '-4'.
x = 7

Simplifying
x = 7

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