.9=70+.8x

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Solution for .9=70+.8x equation:


Simplifying
0.9 = 70 + 0.8x

Solving
0.9 = 70 + 0.8x

Solving for variable 'x'.

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

Add '-0.8x' to each side of the equation.
0.9 + -0.8x = 70 + 0.8x + -0.8x

Combine like terms: 0.8x + -0.8x = 0.0
0.9 + -0.8x = 70 + 0.0
0.9 + -0.8x = 70

Add '-0.9' to each side of the equation.
0.9 + -0.9 + -0.8x = 70 + -0.9

Combine like terms: 0.9 + -0.9 = 0.0
0.0 + -0.8x = 70 + -0.9
-0.8x = 70 + -0.9

Combine like terms: 70 + -0.9 = 69.1
-0.8x = 69.1

Divide each side by '-0.8'.
x = -86.375

Simplifying
x = -86.375

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