-7(5a+8)+1=-300

Solution for -7(5a+8)+1=-300 equation:

Simplifying
-7(5a + 8) + 1 = -300

Reorder the terms:
-7(8 + 5a) + 1 = -300
(8 * -7 + 5a * -7) + 1 = -300
(-56 + -35a) + 1 = -300

Reorder the terms:
-56 + 1 + -35a = -300

Combine like terms: -56 + 1 = -55
-55 + -35a = -300

Solving
-55 + -35a = -300

Solving for variable 'a'.

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

Add '55' to each side of the equation.
-55 + 55 + -35a = -300 + 55

Combine like terms: -55 + 55 = 0
0 + -35a = -300 + 55
-35a = -300 + 55

Combine like terms: -300 + 55 = -245
-35a = -245

Divide each side by '-35'.
a = 7

Simplifying
a = 7