.40x+4+.80x=40

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Solution for .40x+4+.80x=40 equation:


Simplifying
0.40x + 4 + 0.80x = 40

Reorder the terms:
4 + 0.40x + 0.80x = 40

Combine like terms: 0.40x + 0.80x = 1.2x
4 + 1.2x = 40

Solving
4 + 1.2x = 40

Solving for variable 'x'.

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

Add '-4' to each side of the equation.
4 + -4 + 1.2x = 40 + -4

Combine like terms: 4 + -4 = 0
0 + 1.2x = 40 + -4
1.2x = 40 + -4

Combine like terms: 40 + -4 = 36
1.2x = 36

Divide each side by '1.2'.
x = 30

Simplifying
x = 30

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