3(x+4)-7x=9

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Solution for 3(x+4)-7x=9 equation: 


Simplifying
3(x + 4) + -7x = 9

Reorder the terms:
3(4 + x) + -7x = 9
(4 * 3 + x * 3) + -7x = 9
(12 + 3x) + -7x = 9

Combine like terms: 3x + -7x = -4x
12 + -4x = 9

Solving
12 + -4x = 9

Solving for variable 'x'.

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

Add '-12' to each side of the equation.
12 + -12 + -4x = 9 + -12

Combine like terms: 12 + -12 = 0
0 + -4x = 9 + -12
-4x = 9 + -12

Combine like terms: 9 + -12 = -3
-4x = -3

Divide each side by '-4'.
x = 0.75

Simplifying
x = 0.75

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