3(5y-7a)+5(3a-7y)=7(5y-3a)

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


Simplifying
3(5y + -7a) + 5(3a + -7y) = 7(5y + -3a)

Reorder the terms:
3(-7a + 5y) + 5(3a + -7y) = 7(5y + -3a)
(-7a * 3 + 5y * 3) + 5(3a + -7y) = 7(5y + -3a)
(-21a + 15y) + 5(3a + -7y) = 7(5y + -3a)
-21a + 15y + (3a * 5 + -7y * 5) = 7(5y + -3a)
-21a + 15y + (15a + -35y) = 7(5y + -3a)

Reorder the terms:
-21a + 15a + 15y + -35y = 7(5y + -3a)

Combine like terms: -21a + 15a = -6a
-6a + 15y + -35y = 7(5y + -3a)

Combine like terms: 15y + -35y = -20y
-6a + -20y = 7(5y + -3a)

Reorder the terms:
-6a + -20y = 7(-3a + 5y)
-6a + -20y = (-3a * 7 + 5y * 7)
-6a + -20y = (-21a + 35y)

Solving
-6a + -20y = -21a + 35y

Solving for variable 'a'.

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

Add '21a' to each side of the equation.
-6a + 21a + -20y = -21a + 21a + 35y

Combine like terms: -6a + 21a = 15a
15a + -20y = -21a + 21a + 35y

Combine like terms: -21a + 21a = 0
15a + -20y = 0 + 35y
15a + -20y = 35y

Add '20y' to each side of the equation.
15a + -20y + 20y = 35y + 20y

Combine like terms: -20y + 20y = 0
15a + 0 = 35y + 20y
15a = 35y + 20y

Combine like terms: 35y + 20y = 55y
15a = 55y

Divide each side by '15'.
a = 3.666666667y

Simplifying
a = 3.666666667y

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