8x(x+9)=7x+63

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Solution for 8x(x+9)=7x+63 equation: 


Simplifying
8x(x + 9) = 7x + 63

Reorder the terms:
8x(9 + x) = 7x + 63
(9 * 8x + x * 8x) = 7x + 63
(72x + 8x2) = 7x + 63

Reorder the terms:
72x + 8x2 = 63 + 7x

Solving
72x + 8x2 = 63 + 7x

Solving for variable 'x'.

Reorder the terms:
-63 + 72x + -7x + 8x2 = 63 + 7x + -63 + -7x

Combine like terms: 72x + -7x = 65x
-63 + 65x + 8x2 = 63 + 7x + -63 + -7x

Reorder the terms:
-63 + 65x + 8x2 = 63 + -63 + 7x + -7x

Combine like terms: 63 + -63 = 0
-63 + 65x + 8x2 = 0 + 7x + -7x
-63 + 65x + 8x2 = 7x + -7x

Combine like terms: 7x + -7x = 0
-63 + 65x + 8x2 = 0

Factor a trinomial.
(-9 + -1x)(7 + -8x) = 0


Subproblem 1
Set the factor '(-9 + -1x)' equal to zero and attempt to solve:

Simplifying
-9 + -1x = 0

Solving
-9 + -1x = 0

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

Add '9' to each side of the equation.
-9 + 9 + -1x = 0 + 9

Combine like terms: -9 + 9 = 0
0 + -1x = 0 + 9
-1x = 0 + 9

Combine like terms: 0 + 9 = 9
-1x = 9

Divide each side by '-1'.
x = -9

Simplifying
x = -9

Subproblem 2
Set the factor '(7 + -8x)' equal to zero and attempt to solve:

Simplifying
7 + -8x = 0

Solving
7 + -8x = 0

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

Add '-7' to each side of the equation.
7 + -7 + -8x = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -8x = 0 + -7
-8x = 0 + -7

Combine like terms: 0 + -7 = -7
-8x = -7

Divide each side by '-8'.
x = 0.875

Simplifying
x = 0.875
Solution
x = {-9, 0.875}

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