15-x+4+2x=21

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Solution for 15-x+4+2x=21 equation:


Simplifying
15 + -1x + 4 + 2x = 21

Reorder the terms:
15 + 4 + -1x + 2x = 21

Combine like terms: 15 + 4 = 19
19 + -1x + 2x = 21

Combine like terms: -1x + 2x = 1x
19 + 1x = 21

Solving
19 + 1x = 21

Solving for variable 'x'.

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

Add '-19' to each side of the equation.
19 + -19 + 1x = 21 + -19

Combine like terms: 19 + -19 = 0
0 + 1x = 21 + -19
1x = 21 + -19

Combine like terms: 21 + -19 = 2
1x = 2

Divide each side by '1'.
x = 2

Simplifying
x = 2

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