0.07x+0.09(100-x)=6.4

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Solution for 0.07x+0.09(100-x)=6.4 equation:


Simplifying
0.07x + 0.09(100 + -1x) = 6.4
0.07x + (100 * 0.09 + -1x * 0.09) = 6.4
0.07x + (9 + -0.09x) = 6.4

Reorder the terms:
9 + 0.07x + -0.09x = 6.4

Combine like terms: 0.07x + -0.09x = -0.02x
9 + -0.02x = 6.4

Solving
9 + -0.02x = 6.4

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 = 6.4 + -9

Combine like terms: 9 + -9 = 0
0 + -0.02x = 6.4 + -9
-0.02x = 6.4 + -9

Combine like terms: 6.4 + -9 = -2.6
-0.02x = -2.6

Divide each side by '-0.02'.
x = 130

Simplifying
x = 130

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