15x+18=21x-6

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Solution for 15x+18=21x-6 equation:


Simplifying
15x + 18 = 21x + -6

Reorder the terms:
18 + 15x = 21x + -6

Reorder the terms:
18 + 15x = -6 + 21x

Solving
18 + 15x = -6 + 21x

Solving for variable 'x'.

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

Add '-21x' to each side of the equation.
18 + 15x + -21x = -6 + 21x + -21x

Combine like terms: 15x + -21x = -6x
18 + -6x = -6 + 21x + -21x

Combine like terms: 21x + -21x = 0
18 + -6x = -6 + 0
18 + -6x = -6

Add '-18' to each side of the equation.
18 + -18 + -6x = -6 + -18

Combine like terms: 18 + -18 = 0
0 + -6x = -6 + -18
-6x = -6 + -18

Combine like terms: -6 + -18 = -24
-6x = -24

Divide each side by '-6'.
x = 4

Simplifying
x = 4

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