-0.5x-1.5Y=4.5x-7y=-21

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Solution for -0.5x-1.5Y=4.5x-7y=-21 equation: 


Simplifying
-0.5x + -1.5Y = 4.5

Reorder the terms:
-1.5Y + -0.5x = 4.5

Solving
-1.5Y + -0.5x = 4.5

Solving for variable 'Y'.

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

Add '0.5x' to each side of the equation.
-1.5Y + -0.5x + 0.5x = 4.5 + 0.5x

Combine like terms: -0.5x + 0.5x = 0.0
-1.5Y + 0.0 = 4.5 + 0.5x
-1.5Y = 4.5 + 0.5x

Divide each side by '-1.5'.
Y = -3 + -0.3333333333x

Simplifying
Y = -3 + -0.3333333333x

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