.7x+.9y=90

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Solution for .7x+.9y=90 equation:


Simplifying
0.7x + 0.9y = 90

Solving
0.7x + 0.9y = 90

Solving for variable 'x'.

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

Add '-0.9y' to each side of the equation.
0.7x + 0.9y + -0.9y = 90 + -0.9y

Combine like terms: 0.9y + -0.9y = 0.0
0.7x + 0.0 = 90 + -0.9y
0.7x = 90 + -0.9y

Divide each side by '0.7'.
x = 128.5714286 + -1.285714286y

Simplifying
x = 128.5714286 + -1.285714286y

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