.9x*.25*80=.8(80+x)

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Solution for .9x*.25*80=.8(80+x) equation: 


Simplifying
0.9x * 0.25 * 80 = 0.8(80 + x)

Reorder the terms for easier multiplication:
0.9 * 0.25 * 80x = 0.8(80 + x)

Multiply 0.9 * 0.25
0.225 * 80x = 0.8(80 + x)

Multiply 0.225 * 80
18x = 0.8(80 + x)
18x = (80 * 0.8 + x * 0.8)
18x = (64 + 0.8x)

Solving
18x = 64 + 0.8x

Solving for variable 'x'.

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

Add '-0.8x' to each side of the equation.
18x + -0.8x = 64 + 0.8x + -0.8x

Combine like terms: 18x + -0.8x = 17.2x
17.2x = 64 + 0.8x + -0.8x

Combine like terms: 0.8x + -0.8x = 0.0
17.2x = 64 + 0.0
17.2x = 64

Divide each side by '17.2'.
x = 3.720930233

Simplifying
x = 3.720930233

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