20-45=4(x-1)-9

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Solution for 20-45=4(x-1)-9 equation:


Simplifying
20 + -45 = 4(x + -1) + -9

Combine like terms: 20 + -45 = -25
-25 = 4(x + -1) + -9

Reorder the terms:
-25 = 4(-1 + x) + -9
-25 = (-1 * 4 + x * 4) + -9
-25 = (-4 + 4x) + -9

Reorder the terms:
-25 = -4 + -9 + 4x

Combine like terms: -4 + -9 = -13
-25 = -13 + 4x

Solving
-25 = -13 + 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.
-25 + -4x = -13 + 4x + -4x

Combine like terms: 4x + -4x = 0
-25 + -4x = -13 + 0
-25 + -4x = -13

Add '25' to each side of the equation.
-25 + 25 + -4x = -13 + 25

Combine like terms: -25 + 25 = 0
0 + -4x = -13 + 25
-4x = -13 + 25

Combine like terms: -13 + 25 = 12
-4x = 12

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

Simplifying
x = -3

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