(3x-7y)(4x-5y)=

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


Simplifying
(3x + -7y)(4x + -5y) = 0

Multiply (3x + -7y) * (4x + -5y)
(3x * (4x + -5y) + -7y * (4x + -5y)) = 0
((4x * 3x + -5y * 3x) + -7y * (4x + -5y)) = 0

Reorder the terms:
((-15xy + 12x2) + -7y * (4x + -5y)) = 0
((-15xy + 12x2) + -7y * (4x + -5y)) = 0
(-15xy + 12x2 + (4x * -7y + -5y * -7y)) = 0
(-15xy + 12x2 + (-28xy + 35y2)) = 0

Reorder the terms:
(-15xy + -28xy + 12x2 + 35y2) = 0

Combine like terms: -15xy + -28xy = -43xy
(-43xy + 12x2 + 35y2) = 0

Solving
-43xy + 12x2 + 35y2 = 0

Solving for variable 'x'.

Factor a trinomial.
(3x + -7y)(4x + -5y) = 0


Subproblem 1
Set the factor '(3x + -7y)' equal to zero and attempt to solve:

Simplifying
3x + -7y = 0

Solving
3x + -7y = 0

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

Add '7y' to each side of the equation.
3x + -7y + 7y = 0 + 7y

Combine like terms: -7y + 7y = 0
3x + 0 = 0 + 7y
3x = 0 + 7y
Remove the zero:
3x = 7y

Divide each side by '3'.
x = 2.333333333y

Simplifying
x = 2.333333333y

Subproblem 2
Set the factor '(4x + -5y)' equal to zero and attempt to solve:

Simplifying
4x + -5y = 0

Solving
4x + -5y = 0

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

Add '5y' to each side of the equation.
4x + -5y + 5y = 0 + 5y

Combine like terms: -5y + 5y = 0
4x + 0 = 0 + 5y
4x = 0 + 5y
Remove the zero:
4x = 5y

Divide each side by '4'.
x = 1.25y

Simplifying
x = 1.25y
Solution
x = {2.333333333y, 1.25y}

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