(.10)x+(.25)(13-x)=7

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Solution for (.10)x+(.25)(13-x)=7 equation: 


Simplifying
(0.10) * x + (0.25)(13 + -1x) = 7
0.10x + (13 * 0.25 + -1x * 0.25) = 7
0.10x + (3.25 + -0.25x) = 7

Reorder the terms:
3.25 + 0.10x + -0.25x = 7

Combine like terms: 0.10x + -0.25x = -0.15x
3.25 + -0.15x = 7

Solving
3.25 + -0.15x = 7

Solving for variable 'x'.

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

Add '-3.25' to each side of the equation.
3.25 + -3.25 + -0.15x = 7 + -3.25

Combine like terms: 3.25 + -3.25 = 0.00
0.00 + -0.15x = 7 + -3.25
-0.15x = 7 + -3.25

Combine like terms: 7 + -3.25 = 3.75
-0.15x = 3.75

Divide each side by '-0.15'.
x = -25

Simplifying
x = -25

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