20=.4x+15

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Solution for 20=.4x+15 equation:


Simplifying
20 = 0.4x + 15

Reorder the terms:
20 = 15 + 0.4x

Solving
20 = 15 + 0.4x

Solving for variable 'x'.

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

Add '-0.4x' to each side of the equation.
20 + -0.4x = 15 + 0.4x + -0.4x

Combine like terms: 0.4x + -0.4x = 0.0
20 + -0.4x = 15 + 0.0
20 + -0.4x = 15

Add '-20' to each side of the equation.
20 + -20 + -0.4x = 15 + -20

Combine like terms: 20 + -20 = 0
0 + -0.4x = 15 + -20
-0.4x = 15 + -20

Combine like terms: 15 + -20 = -5
-0.4x = -5

Divide each side by '-0.4'.
x = 12.5

Simplifying
x = 12.5

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