12=5x+8(x-5)

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Solution for 12=5x+8(x-5) equation:


Simplifying
12 = 5x + 8(x + -5)

Reorder the terms:
12 = 5x + 8(-5 + x)
12 = 5x + (-5 * 8 + x * 8)
12 = 5x + (-40 + 8x)

Reorder the terms:
12 = -40 + 5x + 8x

Combine like terms: 5x + 8x = 13x
12 = -40 + 13x

Solving
12 = -40 + 13x

Solving for variable 'x'.

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

Add '-13x' to each side of the equation.
12 + -13x = -40 + 13x + -13x

Combine like terms: 13x + -13x = 0
12 + -13x = -40 + 0
12 + -13x = -40

Add '-12' to each side of the equation.
12 + -12 + -13x = -40 + -12

Combine like terms: 12 + -12 = 0
0 + -13x = -40 + -12
-13x = -40 + -12

Combine like terms: -40 + -12 = -52
-13x = -52

Divide each side by '-13'.
x = 4

Simplifying
x = 4

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