-21-3=7x-15x

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Solution for -21-3=7x-15x equation:


Simplifying
-21 + -3 = 7x + -15x

Combine like terms: -21 + -3 = -24
-24 = 7x + -15x

Combine like terms: 7x + -15x = -8x
-24 = -8x

Solving
-24 = -8x

Solving for variable 'x'.

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

Add '8x' to each side of the equation.
-24 + 8x = -8x + 8x

Combine like terms: -8x + 8x = 0
-24 + 8x = 0

Add '24' to each side of the equation.
-24 + 24 + 8x = 0 + 24

Combine like terms: -24 + 24 = 0
0 + 8x = 0 + 24
8x = 0 + 24

Combine like terms: 0 + 24 = 24
8x = 24

Divide each side by '8'.
x = 3

Simplifying
x = 3

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