15+x+x=51-x-x-x

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Solution for 15+x+x=51-x-x-x equation: 


Simplifying
15 + x + x = 51 + -1x + -1x + -1x

Combine like terms: x + x = 2x
15 + 2x = 51 + -1x + -1x + -1x

Combine like terms: -1x + -1x = -2x
15 + 2x = 51 + -2x + -1x

Combine like terms: -2x + -1x = -3x
15 + 2x = 51 + -3x

Solving
15 + 2x = 51 + -3x

Solving for variable 'x'.

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

Add '3x' to each side of the equation.
15 + 2x + 3x = 51 + -3x + 3x

Combine like terms: 2x + 3x = 5x
15 + 5x = 51 + -3x + 3x

Combine like terms: -3x + 3x = 0
15 + 5x = 51 + 0
15 + 5x = 51

Add '-15' to each side of the equation.
15 + -15 + 5x = 51 + -15

Combine like terms: 15 + -15 = 0
0 + 5x = 51 + -15
5x = 51 + -15

Combine like terms: 51 + -15 = 36
5x = 36

Divide each side by '5'.
x = 7.2

Simplifying
x = 7.2

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