3x-(x+7)=0

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Solution for 3x-(x+7)=0 equation:


Simplifying
3x + -1(x + 7) = 0

Reorder the terms:
3x + -1(7 + x) = 0
3x + (7 * -1 + x * -1) = 0
3x + (-7 + -1x) = 0

Reorder the terms:
-7 + 3x + -1x = 0

Combine like terms: 3x + -1x = 2x
-7 + 2x = 0

Solving
-7 + 2x = 0

Solving for variable 'x'.

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

Add '7' to each side of the equation.
-7 + 7 + 2x = 0 + 7

Combine like terms: -7 + 7 = 0
0 + 2x = 0 + 7
2x = 0 + 7

Combine like terms: 0 + 7 = 7
2x = 7

Divide each side by '2'.
x = 3.5

Simplifying
x = 3.5

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