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

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


Simplifying
-3(x + 7) = -1x + -3

Reorder the terms:
-3(7 + x) = -1x + -3
(7 * -3 + x * -3) = -1x + -3
(-21 + -3x) = -1x + -3

Reorder the terms:
-21 + -3x = -3 + -1x

Solving
-21 + -3x = -3 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
-21 + -3x + x = -3 + -1x + x

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

Combine like terms: -1x + x = 0
-21 + -2x = -3 + 0
-21 + -2x = -3

Add '21' to each side of the equation.
-21 + 21 + -2x = -3 + 21

Combine like terms: -21 + 21 = 0
0 + -2x = -3 + 21
-2x = -3 + 21

Combine like terms: -3 + 21 = 18
-2x = 18

Divide each side by '-2'.
x = -9

Simplifying
x = -9

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