x+x-3+x-3=15

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


Simplifying
x + x + -3 + x + -3 = 15

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

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

Combine like terms: x + x = 2x
-6 + 2x + x = 15

Combine like terms: 2x + x = 3x
-6 + 3x = 15

Solving
-6 + 3x = 15

Solving for variable 'x'.

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

Add '6' to each side of the equation.
-6 + 6 + 3x = 15 + 6

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

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

Divide each side by '3'.
x = 7

Simplifying
x = 7

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