5(x-10)+7(x+20)=57

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Solution for 5(x-10)+7(x+20)=57 equation:


Simplifying
5(x + -10) + 7(x + 20) = 57

Reorder the terms:
5(-10 + x) + 7(x + 20) = 57
(-10 * 5 + x * 5) + 7(x + 20) = 57
(-50 + 5x) + 7(x + 20) = 57

Reorder the terms:
-50 + 5x + 7(20 + x) = 57
-50 + 5x + (20 * 7 + x * 7) = 57
-50 + 5x + (140 + 7x) = 57

Reorder the terms:
-50 + 140 + 5x + 7x = 57

Combine like terms: -50 + 140 = 90
90 + 5x + 7x = 57

Combine like terms: 5x + 7x = 12x
90 + 12x = 57

Solving
90 + 12x = 57

Solving for variable 'x'.

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

Add '-90' to each side of the equation.
90 + -90 + 12x = 57 + -90

Combine like terms: 90 + -90 = 0
0 + 12x = 57 + -90
12x = 57 + -90

Combine like terms: 57 + -90 = -33
12x = -33

Divide each side by '12'.
x = -2.75

Simplifying
x = -2.75

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