.80x+.80(40)=.40(30)

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Solution for .80x+.80(40)=.40(30) equation:


Simplifying
0.80x + 0.80(40) = 0.40(30)

Multiply 0.80 * 40
0.80x + 32 = 0.40(30)

Reorder the terms:
32 + 0.80x = 0.40(30)

Multiply 0.40 * 30
32 + 0.80x = 12

Solving
32 + 0.80x = 12

Solving for variable 'x'.

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

Add '-32' to each side of the equation.
32 + -32 + 0.80x = 12 + -32

Combine like terms: 32 + -32 = 0
0 + 0.80x = 12 + -32
0.80x = 12 + -32

Combine like terms: 12 + -32 = -20
0.80x = -20

Divide each side by '0.80'.
x = -25

Simplifying
x = -25

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