-84=8(-1+2x)+4

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Solution for -84=8(-1+2x)+4 equation:


Simplifying
-84 = 8(-1 + 2x) + 4
-84 = (-1 * 8 + 2x * 8) + 4
-84 = (-8 + 16x) + 4

Reorder the terms:
-84 = -8 + 4 + 16x

Combine like terms: -8 + 4 = -4
-84 = -4 + 16x

Solving
-84 = -4 + 16x

Solving for variable 'x'.

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

Add '-16x' to each side of the equation.
-84 + -16x = -4 + 16x + -16x

Combine like terms: 16x + -16x = 0
-84 + -16x = -4 + 0
-84 + -16x = -4

Add '84' to each side of the equation.
-84 + 84 + -16x = -4 + 84

Combine like terms: -84 + 84 = 0
0 + -16x = -4 + 84
-16x = -4 + 84

Combine like terms: -4 + 84 = 80
-16x = 80

Divide each side by '-16'.
x = -5

Simplifying
x = -5

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