-6(a+5a)-3(-7b-a)=

Solution for -6(a+5a)-3(-7b-a)= equation:

Simplifying
-6(a + 5a) + -3(-7b + -1a) = 0

Combine like terms: a + 5a = 6a
-6(6a) + -3(-7b + -1a) = 0

Remove parenthesis around (6a)
-6 * 6a + -3(-7b + -1a) = 0

Multiply -6 * 6
-36a + -3(-7b + -1a) = 0

Reorder the terms:
-36a + -3(-1a + -7b) = 0
-36a + (-1a * -3 + -7b * -3) = 0
-36a + (3a + 21b) = 0

Combine like terms: -36a + 3a = -33a
-33a + 21b = 0

Solving
-33a + 21b = 0

Solving for variable 'a'.

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

Add '-21b' to each side of the equation.
-33a + 21b + -21b = 0 + -21b

Combine like terms: 21b + -21b = 0
-33a + 0 = 0 + -21b
-33a = 0 + -21b
Remove the zero:
-33a = -21b

Divide each side by '-33'.
a = 0.6363636364b

Simplifying
a = 0.6363636364b