7(4+a)+5(3+5a)=

Solution for 7(4+a)+5(3+5a)= equation:

Simplifying
7(4 + a) + 5(3 + 5a) = 0
(4 * 7 + a * 7) + 5(3 + 5a) = 0
(28 + 7a) + 5(3 + 5a) = 0
28 + 7a + (3 * 5 + 5a * 5) = 0
28 + 7a + (15 + 25a) = 0

Reorder the terms:
28 + 15 + 7a + 25a = 0

Combine like terms: 28 + 15 = 43
43 + 7a + 25a = 0

Combine like terms: 7a + 25a = 32a
43 + 32a = 0

Solving
43 + 32a = 0

Solving for variable 'a'.

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

Add '-43' to each side of the equation.
43 + -43 + 32a = 0 + -43

Combine like terms: 43 + -43 = 0
0 + 32a = 0 + -43
32a = 0 + -43

Combine like terms: 0 + -43 = -43
32a = -43

Divide each side by '32'.
a = -1.34375

Simplifying
a = -1.34375