10x-15+2x=21

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Solution for 10x-15+2x=21 equation:


Simplifying
10x + -15 + 2x = 21

Reorder the terms:
-15 + 10x + 2x = 21

Combine like terms: 10x + 2x = 12x
-15 + 12x = 21

Solving
-15 + 12x = 21

Solving for variable 'x'.

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

Add '15' to each side of the equation.
-15 + 15 + 12x = 21 + 15

Combine like terms: -15 + 15 = 0
0 + 12x = 21 + 15
12x = 21 + 15

Combine like terms: 21 + 15 = 36
12x = 36

Divide each side by '12'.
x = 3

Simplifying
x = 3

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