18(x+4)+3(x-9)=12(x+7)

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Solution for 18(x+4)+3(x-9)=12(x+7) equation:


Simplifying
18(x + 4) + 3(x + -9) = 12(x + 7)

Reorder the terms:
18(4 + x) + 3(x + -9) = 12(x + 7)
(4 * 18 + x * 18) + 3(x + -9) = 12(x + 7)
(72 + 18x) + 3(x + -9) = 12(x + 7)

Reorder the terms:
72 + 18x + 3(-9 + x) = 12(x + 7)
72 + 18x + (-9 * 3 + x * 3) = 12(x + 7)
72 + 18x + (-27 + 3x) = 12(x + 7)

Reorder the terms:
72 + -27 + 18x + 3x = 12(x + 7)

Combine like terms: 72 + -27 = 45
45 + 18x + 3x = 12(x + 7)

Combine like terms: 18x + 3x = 21x
45 + 21x = 12(x + 7)

Reorder the terms:
45 + 21x = 12(7 + x)
45 + 21x = (7 * 12 + x * 12)
45 + 21x = (84 + 12x)

Solving
45 + 21x = 84 + 12x

Solving for variable 'x'.

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

Add '-12x' to each side of the equation.
45 + 21x + -12x = 84 + 12x + -12x

Combine like terms: 21x + -12x = 9x
45 + 9x = 84 + 12x + -12x

Combine like terms: 12x + -12x = 0
45 + 9x = 84 + 0
45 + 9x = 84

Add '-45' to each side of the equation.
45 + -45 + 9x = 84 + -45

Combine like terms: 45 + -45 = 0
0 + 9x = 84 + -45
9x = 84 + -45

Combine like terms: 84 + -45 = 39
9x = 39

Divide each side by '9'.
x = 4.333333333

Simplifying
x = 4.333333333

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