2x+x-12+x-6=300

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Solution for 2x+x-12+x-6=300 equation:


Simplifying
2x + x + -12 + x + -6 = 300

Reorder the terms:
-12 + -6 + 2x + x + x = 300

Combine like terms: -12 + -6 = -18
-18 + 2x + x + x = 300

Combine like terms: 2x + x = 3x
-18 + 3x + x = 300

Combine like terms: 3x + x = 4x
-18 + 4x = 300

Solving
-18 + 4x = 300

Solving for variable 'x'.

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

Add '18' to each side of the equation.
-18 + 18 + 4x = 300 + 18

Combine like terms: -18 + 18 = 0
0 + 4x = 300 + 18
4x = 300 + 18

Combine like terms: 300 + 18 = 318
4x = 318

Divide each side by '4'.
x = 79.5

Simplifying
x = 79.5

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