3x+4-(-4x)=39

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Solution for 3x+4-(-4x)=39 equation:


Simplifying
3x + 4 + -1(-4x) = 39

Remove parenthesis around (-4x)
3x + 4 + -1 * -4x = 39

Multiply -1 * -4
3x + 4 + 4x = 39

Reorder the terms:
4 + 3x + 4x = 39

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

Solving
4 + 7x = 39

Solving for variable 'x'.

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

Add '-4' to each side of the equation.
4 + -4 + 7x = 39 + -4

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

Combine like terms: 39 + -4 = 35
7x = 35

Divide each side by '7'.
x = 5

Simplifying
x = 5

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