(A+7)(a-1)=20

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Solution for (A+7)(a-1)=20 equation:


Simplifying
(A + 7)(a + -1) = 20

Reorder the terms:
(7 + A)(a + -1) = 20

Reorder the terms:
(7 + A)(-1 + a) = 20

Multiply (7 + A) * (-1 + a)
(7(-1 + a) + A(-1 + a)) = 20
((-1 * 7 + a * 7) + A(-1 + a)) = 20
((-7 + 7a) + A(-1 + a)) = 20
(-7 + 7a + (-1 * A + a * A)) = 20
(-7 + 7a + (-1A + aA)) = 20

Reorder the terms:
(-7 + -1A + 7a + aA) = 20
(-7 + -1A + 7a + aA) = 20

Solving
-7 + -1A + 7a + aA = 20

Solving for variable 'A'.

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

Add '7' to each side of the equation.
-7 + -1A + 7a + 7 + aA = 20 + 7

Reorder the terms:
-7 + 7 + -1A + 7a + aA = 20 + 7

Combine like terms: -7 + 7 = 0
0 + -1A + 7a + aA = 20 + 7
-1A + 7a + aA = 20 + 7

Combine like terms: 20 + 7 = 27
-1A + 7a + aA = 27

Add '-7a' to each side of the equation.
-1A + 7a + -7a + aA = 27 + -7a

Combine like terms: 7a + -7a = 0
-1A + 0 + aA = 27 + -7a
-1A + aA = 27 + -7a

Reorder the terms:
-27 + -1A + 7a + aA = 27 + -7a + -27 + 7a

Reorder the terms:
-27 + -1A + 7a + aA = 27 + -27 + -7a + 7a

Combine like terms: 27 + -27 = 0
-27 + -1A + 7a + aA = 0 + -7a + 7a
-27 + -1A + 7a + aA = -7a + 7a

Combine like terms: -7a + 7a = 0
-27 + -1A + 7a + aA = 0

The solution to this equation could not be determined.

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