21x-3=15x+18

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


Simplifying
21x + -3 = 15x + 18

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

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

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

Combine like terms: 21x + -15x = 6x
-3 + 6x = 18 + 15x + -15x

Combine like terms: 15x + -15x = 0
-3 + 6x = 18 + 0
-3 + 6x = 18

Add '3' to each side of the equation.
-3 + 3 + 6x = 18 + 3

Combine like terms: -3 + 3 = 0
0 + 6x = 18 + 3
6x = 18 + 3

Combine like terms: 18 + 3 = 21
6x = 21

Divide each side by '6'.
x = 3.5

Simplifying
x = 3.5

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