12=-4(-5x-7)

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Solution for 12=-4(-5x-7) equation:


Simplifying
12 = -4(-5x + -7)

Reorder the terms:
12 = -4(-7 + -5x)
12 = (-7 * -4 + -5x * -4)
12 = (28 + 20x)

Solving
12 = 28 + 20x

Solving for variable 'x'.

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

Add '-20x' to each side of the equation.
12 + -20x = 28 + 20x + -20x

Combine like terms: 20x + -20x = 0
12 + -20x = 28 + 0
12 + -20x = 28

Add '-12' to each side of the equation.
12 + -12 + -20x = 28 + -12

Combine like terms: 12 + -12 = 0
0 + -20x = 28 + -12
-20x = 28 + -12

Combine like terms: 28 + -12 = 16
-20x = 16

Divide each side by '-20'.
x = -0.8

Simplifying
x = -0.8

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