3x+(x-7)=39

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Solution for 3x+(x-7)=39 equation:


Simplifying
3x + (x + -7) = 39

Reorder the terms:
3x + (-7 + x) = 39

Remove parenthesis around (-7 + x)
3x + -7 + x = 39

Reorder the terms:
-7 + 3x + x = 39

Combine like terms: 3x + x = 4x
-7 + 4x = 39

Solving
-7 + 4x = 39

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 + 4x = 39 + 7

Combine like terms: -7 + 7 = 0
0 + 4x = 39 + 7
4x = 39 + 7

Combine like terms: 39 + 7 = 46
4x = 46

Divide each side by '4'.
x = 11.5

Simplifying
x = 11.5

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