a=4(2x+7y)-5(-2y+4x)+3(-3-5y)

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Solution for a=4(2x+7y)-5(-2y+4x)+3(-3-5y) equation: 


Simplifying
a = 4(2x + 7y) + -5(-2y + 4x) + 3(-3 + -5y)
a = (2x * 4 + 7y * 4) + -5(-2y + 4x) + 3(-3 + -5y)
a = (8x + 28y) + -5(-2y + 4x) + 3(-3 + -5y)

Reorder the terms:
a = 8x + 28y + -5(4x + -2y) + 3(-3 + -5y)
a = 8x + 28y + (4x * -5 + -2y * -5) + 3(-3 + -5y)
a = 8x + 28y + (-20x + 10y) + 3(-3 + -5y)
a = 8x + 28y + -20x + 10y + (-3 * 3 + -5y * 3)
a = 8x + 28y + -20x + 10y + (-9 + -15y)

Reorder the terms:
a = -9 + 8x + -20x + 28y + 10y + -15y

Combine like terms: 8x + -20x = -12x
a = -9 + -12x + 28y + 10y + -15y

Combine like terms: 28y + 10y = 38y
a = -9 + -12x + 38y + -15y

Combine like terms: 38y + -15y = 23y
a = -9 + -12x + 23y

Solving
a = -9 + -12x + 23y

Solving for variable 'a'.

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

Simplifying
a = -9 + -12x + 23y

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