.8(x+20)-4.5=.7(5+x)-.9x

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Solution for .8(x+20)-4.5=.7(5+x)-.9x equation:


Simplifying
0.8(x + 20) + -4.5 = 0.7(5 + x) + -0.9x

Reorder the terms:
0.8(20 + x) + -4.5 = 0.7(5 + x) + -0.9x
(20 * 0.8 + x * 0.8) + -4.5 = 0.7(5 + x) + -0.9x
(16 + 0.8x) + -4.5 = 0.7(5 + x) + -0.9x

Reorder the terms:
16 + -4.5 + 0.8x = 0.7(5 + x) + -0.9x

Combine like terms: 16 + -4.5 = 11.5
11.5 + 0.8x = 0.7(5 + x) + -0.9x
11.5 + 0.8x = (5 * 0.7 + x * 0.7) + -0.9x
11.5 + 0.8x = (3.5 + 0.7x) + -0.9x

Combine like terms: 0.7x + -0.9x = -0.2x
11.5 + 0.8x = 3.5 + -0.2x

Solving
11.5 + 0.8x = 3.5 + -0.2x

Solving for variable 'x'.

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

Add '0.2x' to each side of the equation.
11.5 + 0.8x + 0.2x = 3.5 + -0.2x + 0.2x

Combine like terms: 0.8x + 0.2x = 1x
11.5 + 1x = 3.5 + -0.2x + 0.2x

Combine like terms: -0.2x + 0.2x = 0.0
11.5 + 1x = 3.5 + 0.0
11.5 + 1x = 3.5

Add '-11.5' to each side of the equation.
11.5 + -11.5 + 1x = 3.5 + -11.5

Combine like terms: 11.5 + -11.5 = 0.0
0.0 + 1x = 3.5 + -11.5
1x = 3.5 + -11.5

Combine like terms: 3.5 + -11.5 = -8
1x = -8

Divide each side by '1'.
x = -8

Simplifying
x = -8

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