-20=-3(x-1)+7(x-5)

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Solution for -20=-3(x-1)+7(x-5) equation:


Simplifying
-20 = -3(x + -1) + 7(x + -5)

Reorder the terms:
-20 = -3(-1 + x) + 7(x + -5)
-20 = (-1 * -3 + x * -3) + 7(x + -5)
-20 = (3 + -3x) + 7(x + -5)

Reorder the terms:
-20 = 3 + -3x + 7(-5 + x)
-20 = 3 + -3x + (-5 * 7 + x * 7)
-20 = 3 + -3x + (-35 + 7x)

Reorder the terms:
-20 = 3 + -35 + -3x + 7x

Combine like terms: 3 + -35 = -32
-20 = -32 + -3x + 7x

Combine like terms: -3x + 7x = 4x
-20 = -32 + 4x

Solving
-20 = -32 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
-20 + -4x = -32 + 4x + -4x

Combine like terms: 4x + -4x = 0
-20 + -4x = -32 + 0
-20 + -4x = -32

Add '20' to each side of the equation.
-20 + 20 + -4x = -32 + 20

Combine like terms: -20 + 20 = 0
0 + -4x = -32 + 20
-4x = -32 + 20

Combine like terms: -32 + 20 = -12
-4x = -12

Divide each side by '-4'.
x = 3

Simplifying
x = 3

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