(a+90-a)*(a+90-a)=(90)*(90)

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Solution for (a+90-a)*(a+90-a)=(90)*(90) equation: 


Simplifying
(a + 90 + -1a)(a + 90 + -1a) = (90)(90)

Reorder the terms:
(90 + a + -1a)(a + 90 + -1a) = (90)(90)

Combine like terms: a + -1a = 0
(90 + 0)(a + 90 + -1a) = (90)(90)
(90)(a + 90 + -1a) = (90)(90)

Reorder the terms:
90(90 + a + -1a) = (90)(90)

Combine like terms: a + -1a = 0
90(90 + 0) = (90)(90)
90(90) = (90)(90)

Multiply 90 * 90
8100 = (90)(90)

Multiply 90 * 90
8100 = 8100

Add '-8100' to each side of the equation.
8100 + -8100 = 8100 + -8100

Combine like terms: 8100 + -8100 = 0
0 = 8100 + -8100

Combine like terms: 8100 + -8100 = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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