0.20x+0.45(30)=21.5

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Solution for 0.20x+0.45(30)=21.5 equation: 


Simplifying
0.20x + 0.45(30) = 21.5

Multiply 0.45 * 30
0.20x + 13.5 = 21.5

Reorder the terms:
13.5 + 0.20x = 21.5

Solving
13.5 + 0.20x = 21.5

Solving for variable 'x'.

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

Add '-13.5' to each side of the equation.
13.5 + -13.5 + 0.20x = 21.5 + -13.5

Combine like terms: 13.5 + -13.5 = 0.0
0.0 + 0.20x = 21.5 + -13.5
0.20x = 21.5 + -13.5

Combine like terms: 21.5 + -13.5 = 8
0.20x = 8

Divide each side by '0.20'.
x = 40

Simplifying
x = 40

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