0.9(2x+2)=20-(x+7)

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Solution for 0.9(2x+2)=20-(x+7) equation:


Simplifying
0.9(2x + 2) = 20 + -1(x + 7)

Reorder the terms:
0.9(2 + 2x) = 20 + -1(x + 7)
(2 * 0.9 + 2x * 0.9) = 20 + -1(x + 7)
(1.8 + 1.8x) = 20 + -1(x + 7)

Reorder the terms:
1.8 + 1.8x = 20 + -1(7 + x)
1.8 + 1.8x = 20 + (7 * -1 + x * -1)
1.8 + 1.8x = 20 + (-7 + -1x)

Combine like terms: 20 + -7 = 13
1.8 + 1.8x = 13 + -1x

Solving
1.8 + 1.8x = 13 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
1.8 + 1.8x + x = 13 + -1x + x

Combine like terms: 1.8x + x = 2.8x
1.8 + 2.8x = 13 + -1x + x

Combine like terms: -1x + x = 0
1.8 + 2.8x = 13 + 0
1.8 + 2.8x = 13

Add '-1.8' to each side of the equation.
1.8 + -1.8 + 2.8x = 13 + -1.8

Combine like terms: 1.8 + -1.8 = 0.0
0.0 + 2.8x = 13 + -1.8
2.8x = 13 + -1.8

Combine like terms: 13 + -1.8 = 11.2
2.8x = 11.2

Divide each side by '2.8'.
x = 4

Simplifying
x = 4

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