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

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


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

Reorder the terms:
3(8 + 7x) + -9 = 3(x + -1)
(8 * 3 + 7x * 3) + -9 = 3(x + -1)
(24 + 21x) + -9 = 3(x + -1)

Reorder the terms:
24 + -9 + 21x = 3(x + -1)

Combine like terms: 24 + -9 = 15
15 + 21x = 3(x + -1)

Reorder the terms:
15 + 21x = 3(-1 + x)
15 + 21x = (-1 * 3 + x * 3)
15 + 21x = (-3 + 3x)

Solving
15 + 21x = -3 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
15 + 21x + -3x = -3 + 3x + -3x

Combine like terms: 21x + -3x = 18x
15 + 18x = -3 + 3x + -3x

Combine like terms: 3x + -3x = 0
15 + 18x = -3 + 0
15 + 18x = -3

Add '-15' to each side of the equation.
15 + -15 + 18x = -3 + -15

Combine like terms: 15 + -15 = 0
0 + 18x = -3 + -15
18x = -3 + -15

Combine like terms: -3 + -15 = -18
18x = -18

Divide each side by '18'.
x = -1

Simplifying
x = -1

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