(80*.4)+(76*.4)+(x*.2)=80

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Solution for (80*.4)+(76*.4)+(x*.2)=80 equation: 


Simplifying
(80 * 0.4) + (76 * 0.4) + (x * 0.2) = 80

Multiply 80 * 0.4
(32) + (76 * 0.4) + (x * 0.2) = 80
32 + (76 * 0.4) + (x * 0.2) = 80

Multiply 76 * 0.4
32 + (30.4) + (x * 0.2) = 80
32 + 30.4 + (x * 0.2) = 80

Reorder the terms for easier multiplication:
32 + 30.4 + (0.2x) = 80

Combine like terms: 32 + 30.4 = 62.4
62.4 + (0.2x) = 80

Solving
62.4 + (0.2x) = 80

Solving for variable 'x'.

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

Add '-62.4' to each side of the equation.
62.4 + -62.4 + (0.2x) = 80 + -62.4

Combine like terms: 62.4 + -62.4 = 0.0
0.0 + (0.2x) = 80 + -62.4
(0.2x) = 80 + -62.4

Combine like terms: 80 + -62.4 = 17.6
(0.2x) = 17.6

Divide each side by '0.2'.
x = 88

Simplifying
x = 88

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