0.4x-0.9y=-1.2

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Solution for 0.4x-0.9y=-1.2 equation: 


Simplifying
0.4x + -0.9y = -1.2

Solving
0.4x + -0.9y = -1.2

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.
0.4x + -0.9y + 0.9y = -1.2 + 0.9y

Combine like terms: -0.9y + 0.9y = 0.0
0.4x + 0.0 = -1.2 + 0.9y
0.4x = -1.2 + 0.9y

Divide each side by '0.4'.
x = -3 + 2.25y

Simplifying
x = -3 + 2.25y

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