7(3x+12)-6=(-90)

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Solution for 7(3x+12)-6=(-90) equation:


Simplifying
7(3x + 12) + -6 = (-90)

Reorder the terms:
7(12 + 3x) + -6 = (-90)
(12 * 7 + 3x * 7) + -6 = (-90)
(84 + 21x) + -6 = (-90)

Reorder the terms:
84 + -6 + 21x = (-90)

Combine like terms: 84 + -6 = 78
78 + 21x = (-90)
78 + 21x = -90

Solving
78 + 21x = -90

Solving for variable 'x'.

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

Add '-78' to each side of the equation.
78 + -78 + 21x = -90 + -78

Combine like terms: 78 + -78 = 0
0 + 21x = -90 + -78
21x = -90 + -78

Combine like terms: -90 + -78 = -168
21x = -168

Divide each side by '21'.
x = -8

Simplifying
x = -8

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