9(1-2x)-5(2-5x)=20

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Solution for 9(1-2x)-5(2-5x)=20 equation:


Simplifying
9(1 + -2x) + -5(2 + -5x) = 20
(1 * 9 + -2x * 9) + -5(2 + -5x) = 20
(9 + -18x) + -5(2 + -5x) = 20
9 + -18x + (2 * -5 + -5x * -5) = 20
9 + -18x + (-10 + 25x) = 20

Reorder the terms:
9 + -10 + -18x + 25x = 20

Combine like terms: 9 + -10 = -1
-1 + -18x + 25x = 20

Combine like terms: -18x + 25x = 7x
-1 + 7x = 20

Solving
-1 + 7x = 20

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + 7x = 20 + 1

Combine like terms: -1 + 1 = 0
0 + 7x = 20 + 1
7x = 20 + 1

Combine like terms: 20 + 1 = 21
7x = 21

Divide each side by '7'.
x = 3

Simplifying
x = 3

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