.06+0.08(100-x)=4.2

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Solution for .06+0.08(100-x)=4.2 equation: 


Simplifying
0.06 + 0.08(100 + -1x) = 4.2
0.06 + (100 * 0.08 + -1x * 0.08) = 4.2
0.06 + (8 + -0.08x) = 4.2

Combine like terms: 0.06 + 8 = 8.06
8.06 + -0.08x = 4.2

Solving
8.06 + -0.08x = 4.2

Solving for variable 'x'.

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

Add '-8.06' to each side of the equation.
8.06 + -8.06 + -0.08x = 4.2 + -8.06

Combine like terms: 8.06 + -8.06 = 0.00
0.00 + -0.08x = 4.2 + -8.06
-0.08x = 4.2 + -8.06

Combine like terms: 4.2 + -8.06 = -3.86
-0.08x = -3.86

Divide each side by '-0.08'.
x = 48.25

Simplifying
x = 48.25

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