.13x+.21(100-x)=

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Solution for .13x+.21(100-x)= equation:


Simplifying
0.13x + 0.21(100 + -1x) = 0
0.13x + (100 * 0.21 + -1x * 0.21) = 0
0.13x + (21 + -0.21x) = 0

Reorder the terms:
21 + 0.13x + -0.21x = 0

Combine like terms: 0.13x + -0.21x = -0.08x
21 + -0.08x = 0

Solving
21 + -0.08x = 0

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + -0.08x = 0 + -21

Combine like terms: 21 + -21 = 0
0 + -0.08x = 0 + -21
-0.08x = 0 + -21

Combine like terms: 0 + -21 = -21
-0.08x = -21

Divide each side by '-0.08'.
x = 262.5

Simplifying
x = 262.5

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