x^2+7x-87=8x+3

Solution for x^2+7x-87=8x+3 equation:

Simplifying
x2 + 7x + -87 = 8x + 3

Reorder the terms:
-87 + 7x + x2 = 8x + 3

Reorder the terms:
-87 + 7x + x2 = 3 + 8x

Solving
-87 + 7x + x2 = 3 + 8x

Solving for variable 'x'.

Reorder the terms:
-87 + -3 + 7x + -8x + x2 = 3 + 8x + -3 + -8x

Combine like terms: -87 + -3 = -90
-90 + 7x + -8x + x2 = 3 + 8x + -3 + -8x

Combine like terms: 7x + -8x = -1x
-90 + -1x + x2 = 3 + 8x + -3 + -8x

Reorder the terms:
-90 + -1x + x2 = 3 + -3 + 8x + -8x

Combine like terms: 3 + -3 = 0
-90 + -1x + x2 = 0 + 8x + -8x
-90 + -1x + x2 = 8x + -8x

Combine like terms: 8x + -8x = 0
-90 + -1x + x2 = 0

Factor a trinomial.
(-9 + -1x)(10 + -1x) = 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 '(10 + -1x)' equal to zero and attempt to solve:

Simplifying
10 + -1x = 0

Solving
10 + -1x = 0

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

Add '-10' to each side of the equation.
10 + -10 + -1x = 0 + -10

Combine like terms: 10 + -10 = 0
0 + -1x = 0 + -10
-1x = 0 + -10

Combine like terms: 0 + -10 = -10
-1x = -10

Divide each side by '-1'.
x = 10

Simplifying
x = 10
Solution
x = {-9, 10}