(5-a)(-7)=

Solution for (5-a)(-7)= equation:

Simplifying
(5 + -1a)(-7) = 0

Reorder the terms for easier multiplication:
-7(5 + -1a) = 0
(5 * -7 + -1a * -7) = 0
(-35 + 7a) = 0

Solving
-35 + 7a = 0

Solving for variable 'a'.

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

Add '35' to each side of the equation.
-35 + 35 + 7a = 0 + 35

Combine like terms: -35 + 35 = 0
0 + 7a = 0 + 35
7a = 0 + 35

Combine like terms: 0 + 35 = 35
7a = 35

Divide each side by '7'.
a = 5

Simplifying
a = 5