15x+9=-7x-21

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Solution for 15x+9=-7x-21 equation:


Simplifying
15x + 9 = -7x + -21

Reorder the terms:
9 + 15x = -7x + -21

Reorder the terms:
9 + 15x = -21 + -7x

Solving
9 + 15x = -21 + -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.
9 + 15x + 7x = -21 + -7x + 7x

Combine like terms: 15x + 7x = 22x
9 + 22x = -21 + -7x + 7x

Combine like terms: -7x + 7x = 0
9 + 22x = -21 + 0
9 + 22x = -21

Add '-9' to each side of the equation.
9 + -9 + 22x = -21 + -9

Combine like terms: 9 + -9 = 0
0 + 22x = -21 + -9
22x = -21 + -9

Combine like terms: -21 + -9 = -30
22x = -30

Divide each side by '22'.
x = -1.363636364

Simplifying
x = -1.363636364

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