0.9x+0.1(40-x)=40

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Solution for 0.9x+0.1(40-x)=40 equation:


Simplifying
0.9x + 0.1(40 + -1x) = 40
0.9x + (40 * 0.1 + -1x * 0.1) = 40
0.9x + (4 + -0.1x) = 40

Reorder the terms:
4 + 0.9x + -0.1x = 40

Combine like terms: 0.9x + -0.1x = 0.8x
4 + 0.8x = 40

Solving
4 + 0.8x = 40

Solving for variable 'x'.

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

Add '-4' to each side of the equation.
4 + -4 + 0.8x = 40 + -4

Combine like terms: 4 + -4 = 0
0 + 0.8x = 40 + -4
0.8x = 40 + -4

Combine like terms: 40 + -4 = 36
0.8x = 36

Divide each side by '0.8'.
x = 45

Simplifying
x = 45

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