18=6x+x+x-13

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Solution for 18=6x+x+x-13 equation:


Simplifying
18 = 6x + x + x + -13

Reorder the terms:
18 = -13 + 6x + x + x

Combine like terms: 6x + x = 7x
18 = -13 + 7x + x

Combine like terms: 7x + x = 8x
18 = -13 + 8x

Solving
18 = -13 + 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
18 + -8x = -13 + 8x + -8x

Combine like terms: 8x + -8x = 0
18 + -8x = -13 + 0
18 + -8x = -13

Add '-18' to each side of the equation.
18 + -18 + -8x = -13 + -18

Combine like terms: 18 + -18 = 0
0 + -8x = -13 + -18
-8x = -13 + -18

Combine like terms: -13 + -18 = -31
-8x = -31

Divide each side by '-8'.
x = 3.875

Simplifying
x = 3.875

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