(7+8x)(9+5x)=

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Solution for (7+8x)(9+5x)= equation: 


Simplifying
(7 + 8x)(9 + 5x) = 0

Multiply (7 + 8x) * (9 + 5x)
(7(9 + 5x) + 8x * (9 + 5x)) = 0
((9 * 7 + 5x * 7) + 8x * (9 + 5x)) = 0
((63 + 35x) + 8x * (9 + 5x)) = 0
(63 + 35x + (9 * 8x + 5x * 8x)) = 0
(63 + 35x + (72x + 40x2)) = 0

Combine like terms: 35x + 72x = 107x
(63 + 107x + 40x2) = 0

Solving
63 + 107x + 40x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(9 + 5x)(7 + 8x) = 0


Subproblem 1
Set the factor '(9 + 5x)' equal to zero and attempt to solve:

Simplifying
9 + 5x = 0

Solving
9 + 5x = 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 + 5x = 0 + -9

Combine like terms: 9 + -9 = 0
0 + 5x = 0 + -9
5x = 0 + -9

Combine like terms: 0 + -9 = -9
5x = -9

Divide each side by '5'.
x = -1.8

Simplifying
x = -1.8

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 = {-1.8, -0.875}

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