0.1x+0.3(100-x)=0.25

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Solution for 0.1x+0.3(100-x)=0.25 equation: 


Simplifying
0.1x + 0.3(100 + -1x) = 0.25
0.1x + (100 * 0.3 + -1x * 0.3) = 0.25
0.1x + (30 + -0.3x) = 0.25

Reorder the terms:
30 + 0.1x + -0.3x = 0.25

Combine like terms: 0.1x + -0.3x = -0.2x
30 + -0.2x = 0.25

Solving
30 + -0.2x = 0.25

Solving for variable 'x'.

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

Add '-30' to each side of the equation.
30 + -30 + -0.2x = 0.25 + -30

Combine like terms: 30 + -30 = 0
0 + -0.2x = 0.25 + -30
-0.2x = 0.25 + -30

Combine like terms: 0.25 + -30 = -29.75
-0.2x = -29.75

Divide each side by '-0.2'.
x = 148.75

Simplifying
x = 148.75

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