3(1+7x)+9=9(-8+x)

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Solution for 3(1+7x)+9=9(-8+x) equation:


Simplifying
3(1 + 7x) + 9 = 9(-8 + x)
(1 * 3 + 7x * 3) + 9 = 9(-8 + x)
(3 + 21x) + 9 = 9(-8 + x)

Reorder the terms:
3 + 9 + 21x = 9(-8 + x)

Combine like terms: 3 + 9 = 12
12 + 21x = 9(-8 + x)
12 + 21x = (-8 * 9 + x * 9)
12 + 21x = (-72 + 9x)

Solving
12 + 21x = -72 + 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.
12 + 21x + -9x = -72 + 9x + -9x

Combine like terms: 21x + -9x = 12x
12 + 12x = -72 + 9x + -9x

Combine like terms: 9x + -9x = 0
12 + 12x = -72 + 0
12 + 12x = -72

Add '-12' to each side of the equation.
12 + -12 + 12x = -72 + -12

Combine like terms: 12 + -12 = 0
0 + 12x = -72 + -12
12x = -72 + -12

Combine like terms: -72 + -12 = -84
12x = -84

Divide each side by '12'.
x = -7

Simplifying
x = -7

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