.8x+.9(850-x)=715

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Solution for .8x+.9(850-x)=715 equation:


Simplifying
0.8x + 0.9(850 + -1x) = 715
0.8x + (850 * 0.9 + -1x * 0.9) = 715
0.8x + (765 + -0.9x) = 715

Reorder the terms:
765 + 0.8x + -0.9x = 715

Combine like terms: 0.8x + -0.9x = -0.1x
765 + -0.1x = 715

Solving
765 + -0.1x = 715

Solving for variable 'x'.

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

Add '-765' to each side of the equation.
765 + -765 + -0.1x = 715 + -765

Combine like terms: 765 + -765 = 0
0 + -0.1x = 715 + -765
-0.1x = 715 + -765

Combine like terms: 715 + -765 = -50
-0.1x = -50

Divide each side by '-0.1'.
x = 500

Simplifying
x = 500

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