10(20-x)+5x-(10x+5(20-x))=30

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Solution for 10(20-x)+5x-(10x+5(20-x))=30 equation:


Simplifying
10(20 + -1x) + 5x + -1(10x + 5(20 + -1x)) = 30
(20 * 10 + -1x * 10) + 5x + -1(10x + 5(20 + -1x)) = 30
(200 + -10x) + 5x + -1(10x + 5(20 + -1x)) = 30
200 + -10x + 5x + -1(10x + (20 * 5 + -1x * 5)) = 30
200 + -10x + 5x + -1(10x + (100 + -5x)) = 30

Reorder the terms:
200 + -10x + 5x + -1(100 + 10x + -5x) = 30

Combine like terms: 10x + -5x = 5x
200 + -10x + 5x + -1(100 + 5x) = 30
200 + -10x + 5x + (100 * -1 + 5x * -1) = 30
200 + -10x + 5x + (-100 + -5x) = 30

Reorder the terms:
200 + -100 + -10x + 5x + -5x = 30

Combine like terms: 200 + -100 = 100
100 + -10x + 5x + -5x = 30

Combine like terms: -10x + 5x = -5x
100 + -5x + -5x = 30

Combine like terms: -5x + -5x = -10x
100 + -10x = 30

Solving
100 + -10x = 30

Solving for variable 'x'.

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

Add '-100' to each side of the equation.
100 + -100 + -10x = 30 + -100

Combine like terms: 100 + -100 = 0
0 + -10x = 30 + -100
-10x = 30 + -100

Combine like terms: 30 + -100 = -70
-10x = -70

Divide each side by '-10'.
x = 7

Simplifying
x = 7

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