(5w+7)(3-w)=0

Solution for (5w+7)(3-w)=0 equation:

Simplifying
(5w + 7)(3 + -1w) = 0

Reorder the terms:
(7 + 5w)(3 + -1w) = 0

Multiply (7 + 5w) * (3 + -1w)
(7(3 + -1w) + 5w * (3 + -1w)) = 0
((3 * 7 + -1w * 7) + 5w * (3 + -1w)) = 0
((21 + -7w) + 5w * (3 + -1w)) = 0
(21 + -7w + (3 * 5w + -1w * 5w)) = 0
(21 + -7w + (15w + -5w2)) = 0

Combine like terms: -7w + 15w = 8w
(21 + 8w + -5w2) = 0

Solving
21 + 8w + -5w2 = 0

Solving for variable 'w'.

Factor a trinomial.
(3 + -1w)(7 + 5w) = 0

Subproblem 1
Set the factor '(3 + -1w)' equal to zero and attempt to solve:

Simplifying
3 + -1w = 0

Solving
3 + -1w = 0

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

Add '-3' to each side of the equation.
3 + -3 + -1w = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -1w = 0 + -3
-1w = 0 + -3

Combine like terms: 0 + -3 = -3
-1w = -3

Divide each side by '-1'.
w = 3

Simplifying
w = 3
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 = {3, -1.4}