10x-5+3x=21

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Solution for 10x-5+3x=21 equation:


Simplifying
10x + -5 + 3x = 21

Reorder the terms:
-5 + 10x + 3x = 21

Combine like terms: 10x + 3x = 13x
-5 + 13x = 21

Solving
-5 + 13x = 21

Solving for variable 'x'.

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

Add '5' to each side of the equation.
-5 + 5 + 13x = 21 + 5

Combine like terms: -5 + 5 = 0
0 + 13x = 21 + 5
13x = 21 + 5

Combine like terms: 21 + 5 = 26
13x = 26

Divide each side by '13'.
x = 2

Simplifying
x = 2

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