-7-9(1-4x)=-20

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Solution for -7-9(1-4x)=-20 equation:


Simplifying
-7 + -9(1 + -4x) = -20
-7 + (1 * -9 + -4x * -9) = -20
-7 + (-9 + 36x) = -20

Combine like terms: -7 + -9 = -16
-16 + 36x = -20

Solving
-16 + 36x = -20

Solving for variable 'x'.

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

Add '16' to each side of the equation.
-16 + 16 + 36x = -20 + 16

Combine like terms: -16 + 16 = 0
0 + 36x = -20 + 16
36x = -20 + 16

Combine like terms: -20 + 16 = -4
36x = -4

Divide each side by '36'.
x = -0.1111111111

Simplifying
x = -0.1111111111

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