18x-3=15x-21

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Solution for 18x-3=15x-21 equation:


Simplifying
18x + -3 = 15x + -21

Reorder the terms:
-3 + 18x = 15x + -21

Reorder the terms:
-3 + 18x = -21 + 15x

Solving
-3 + 18x = -21 + 15x

Solving for variable 'x'.

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

Add '-15x' to each side of the equation.
-3 + 18x + -15x = -21 + 15x + -15x

Combine like terms: 18x + -15x = 3x
-3 + 3x = -21 + 15x + -15x

Combine like terms: 15x + -15x = 0
-3 + 3x = -21 + 0
-3 + 3x = -21

Add '3' to each side of the equation.
-3 + 3 + 3x = -21 + 3

Combine like terms: -3 + 3 = 0
0 + 3x = -21 + 3
3x = -21 + 3

Combine like terms: -21 + 3 = -18
3x = -18

Divide each side by '3'.
x = -6

Simplifying
x = -6

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