-0.2x+by=7.2

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Solution for -0.2x+by=7.2 equation: 


Simplifying
-0.2x + by = 7.2

Reorder the terms:
by + -0.2x = 7.2

Solving
by + -0.2x = 7.2

Solving for variable 'b'.

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

Add '0.2x' to each side of the equation.
by + -0.2x + 0.2x = 7.2 + 0.2x

Combine like terms: -0.2x + 0.2x = 0.0
by + 0.0 = 7.2 + 0.2x
by = 7.2 + 0.2x

Divide each side by 'y'.
b = 7.2y-1 + 0.2xy-1

Simplifying
b = 7.2y-1 + 0.2xy-1

Reorder the terms:
b = 0.2xy-1 + 7.2y-1

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