15x+21=7x-19

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Solution for 15x+21=7x-19 equation:


Simplifying
15x + 21 = 7x + -19

Reorder the terms:
21 + 15x = 7x + -19

Reorder the terms:
21 + 15x = -19 + 7x

Solving
21 + 15x = -19 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
21 + 15x + -7x = -19 + 7x + -7x

Combine like terms: 15x + -7x = 8x
21 + 8x = -19 + 7x + -7x

Combine like terms: 7x + -7x = 0
21 + 8x = -19 + 0
21 + 8x = -19

Add '-21' to each side of the equation.
21 + -21 + 8x = -19 + -21

Combine like terms: 21 + -21 = 0
0 + 8x = -19 + -21
8x = -19 + -21

Combine like terms: -19 + -21 = -40
8x = -40

Divide each side by '8'.
x = -5

Simplifying
x = -5

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