(5w+7)(8-w)=0

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Solution for (5w+7)(8-w)=0 equation: 


Simplifying
(5w + 7)(8 + -1w) = 0

Reorder the terms:
(7 + 5w)(8 + -1w) = 0

Multiply (7 + 5w) * (8 + -1w)
(7(8 + -1w) + 5w * (8 + -1w)) = 0
((8 * 7 + -1w * 7) + 5w * (8 + -1w)) = 0
((56 + -7w) + 5w * (8 + -1w)) = 0
(56 + -7w + (8 * 5w + -1w * 5w)) = 0
(56 + -7w + (40w + -5w2)) = 0

Combine like terms: -7w + 40w = 33w
(56 + 33w + -5w2) = 0

Solving
56 + 33w + -5w2 = 0

Solving for variable 'w'.

Factor a trinomial.
(8 + -1w)(7 + 5w) = 0


Subproblem 1
Set the factor '(8 + -1w)' equal to zero and attempt to solve:

Simplifying
8 + -1w = 0

Solving
8 + -1w = 0

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

Add '-8' to each side of the equation.
8 + -8 + -1w = 0 + -8

Combine like terms: 8 + -8 = 0
0 + -1w = 0 + -8
-1w = 0 + -8

Combine like terms: 0 + -8 = -8
-1w = -8

Divide each side by '-1'.
w = 8

Simplifying
w = 8

Subproblem 2
Set the factor '(7 + 5w)' equal to zero and attempt to solve:

Simplifying
7 + 5w = 0

Solving
7 + 5w = 0

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

Add '-7' to each side of the equation.
7 + -7 + 5w = 0 + -7

Combine like terms: 7 + -7 = 0
0 + 5w = 0 + -7
5w = 0 + -7

Combine like terms: 0 + -7 = -7
5w = -7

Divide each side by '5'.
w = -1.4

Simplifying
w = -1.4
Solution
w = {8, -1.4}

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