.80x+.40(130)=.40(90)

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Solution for .80x+.40(130)=.40(90) equation:


Simplifying
0.80x + 0.40(130) = 0.40(90)

Multiply 0.40 * 130
0.80x + 52 = 0.40(90)

Reorder the terms:
52 + 0.80x = 0.40(90)

Multiply 0.40 * 90
52 + 0.80x = 36

Solving
52 + 0.80x = 36

Solving for variable 'x'.

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

Add '-52' to each side of the equation.
52 + -52 + 0.80x = 36 + -52

Combine like terms: 52 + -52 = 0
0 + 0.80x = 36 + -52
0.80x = 36 + -52

Combine like terms: 36 + -52 = -16
0.80x = -16

Divide each side by '0.80'.
x = -20

Simplifying
x = -20

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