7x-(3x+18)=18

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Solution for 7x-(3x+18)=18 equation:


Simplifying
7x + -1(3x + 18) = 18

Reorder the terms:
7x + -1(18 + 3x) = 18
7x + (18 * -1 + 3x * -1) = 18
7x + (-18 + -3x) = 18

Reorder the terms:
-18 + 7x + -3x = 18

Combine like terms: 7x + -3x = 4x
-18 + 4x = 18

Solving
-18 + 4x = 18

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 = 18 + 18

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

Combine like terms: 18 + 18 = 36
4x = 36

Divide each side by '4'.
x = 9

Simplifying
x = 9

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