0.9x-0.7y=-7.2

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Solution for 0.9x-0.7y=-7.2 equation: 


Simplifying
0.9x + -0.7y = -7.2

Solving
0.9x + -0.7y = -7.2

Solving for variable 'x'.

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

Add '0.7y' to each side of the equation.
0.9x + -0.7y + 0.7y = -7.2 + 0.7y

Combine like terms: -0.7y + 0.7y = 0.0
0.9x + 0.0 = -7.2 + 0.7y
0.9x = -7.2 + 0.7y

Divide each side by '0.9'.
x = -8 + 0.7777777778y

Simplifying
x = -8 + 0.7777777778y

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