0.07x+0.09(100-x)=8.2

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Solution for 0.07x+0.09(100-x)=8.2 equation:


Simplifying
0.07x + 0.09(100 + -1x) = 8.2
0.07x + (100 * 0.09 + -1x * 0.09) = 8.2
0.07x + (9 + -0.09x) = 8.2

Reorder the terms:
9 + 0.07x + -0.09x = 8.2

Combine like terms: 0.07x + -0.09x = -0.02x
9 + -0.02x = 8.2

Solving
9 + -0.02x = 8.2

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + -0.02x = 8.2 + -9

Combine like terms: 9 + -9 = 0
0 + -0.02x = 8.2 + -9
-0.02x = 8.2 + -9

Combine like terms: 8.2 + -9 = -0.8
-0.02x = -0.8

Divide each side by '-0.02'.
x = 40

Simplifying
x = 40

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