3(4x+5)-4=9x+20

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Solution for 3(4x+5)-4=9x+20 equation:


Simplifying
3(4x + 5) + -4 = 9x + 20

Reorder the terms:
3(5 + 4x) + -4 = 9x + 20
(5 * 3 + 4x * 3) + -4 = 9x + 20
(15 + 12x) + -4 = 9x + 20

Reorder the terms:
15 + -4 + 12x = 9x + 20

Combine like terms: 15 + -4 = 11
11 + 12x = 9x + 20

Reorder the terms:
11 + 12x = 20 + 9x

Solving
11 + 12x = 20 + 9x

Solving for variable 'x'.

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

Add '-9x' to each side of the equation.
11 + 12x + -9x = 20 + 9x + -9x

Combine like terms: 12x + -9x = 3x
11 + 3x = 20 + 9x + -9x

Combine like terms: 9x + -9x = 0
11 + 3x = 20 + 0
11 + 3x = 20

Add '-11' to each side of the equation.
11 + -11 + 3x = 20 + -11

Combine like terms: 11 + -11 = 0
0 + 3x = 20 + -11
3x = 20 + -11

Combine like terms: 20 + -11 = 9
3x = 9

Divide each side by '3'.
x = 3

Simplifying
x = 3

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