-3(5x+7)=-15x-21

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Solution for -3(5x+7)=-15x-21 equation:


Simplifying
-3(5x + 7) = -15x + -21

Reorder the terms:
-3(7 + 5x) = -15x + -21
(7 * -3 + 5x * -3) = -15x + -21
(-21 + -15x) = -15x + -21

Reorder the terms:
-21 + -15x = -21 + -15x

Add '21' to each side of the equation.
-21 + 21 + -15x = -21 + 21 + -15x

Combine like terms: -21 + 21 = 0
0 + -15x = -21 + 21 + -15x
-15x = -21 + 21 + -15x

Combine like terms: -21 + 21 = 0
-15x = 0 + -15x
-15x = -15x

Add '15x' to each side of the equation.
-15x + 15x = -15x + 15x

Combine like terms: -15x + 15x = 0
0 = -15x + 15x

Combine like terms: -15x + 15x = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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