(r-4)(R+8)=9

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Solution for (r-4)(R+8)=9 equation:


Simplifying
(r + -4)(R + 8) = 9

Reorder the terms:
(-4 + r)(R + 8) = 9

Reorder the terms:
(-4 + r)(8 + R) = 9

Multiply (-4 + r) * (8 + R)
(-4(8 + R) + r(8 + R)) = 9
((8 * -4 + R * -4) + r(8 + R)) = 9
((-32 + -4R) + r(8 + R)) = 9
(-32 + -4R + (8 * r + R * r)) = 9
(-32 + -4R + (8r + rR)) = 9
(-32 + -4R + 8r + rR) = 9

Solving
-32 + -4R + 8r + rR = 9

Solving for variable 'R'.

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

Add '32' to each side of the equation.
-32 + -4R + 8r + 32 + rR = 9 + 32

Reorder the terms:
-32 + 32 + -4R + 8r + rR = 9 + 32

Combine like terms: -32 + 32 = 0
0 + -4R + 8r + rR = 9 + 32
-4R + 8r + rR = 9 + 32

Combine like terms: 9 + 32 = 41
-4R + 8r + rR = 41

Add '-8r' to each side of the equation.
-4R + 8r + -8r + rR = 41 + -8r

Combine like terms: 8r + -8r = 0
-4R + 0 + rR = 41 + -8r
-4R + rR = 41 + -8r

Reorder the terms:
-41 + -4R + 8r + rR = 41 + -8r + -41 + 8r

Reorder the terms:
-41 + -4R + 8r + rR = 41 + -41 + -8r + 8r

Combine like terms: 41 + -41 = 0
-41 + -4R + 8r + rR = 0 + -8r + 8r
-41 + -4R + 8r + rR = -8r + 8r

Combine like terms: -8r + 8r = 0
-41 + -4R + 8r + rR = 0

The solution to this equation could not be determined.

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