-3(7b+2)=31

Solution for -3(7b+2)=31 equation:

Simplifying
-3(7b + 2) = 31

Reorder the terms:
-3(2 + 7b) = 31
(2 * -3 + 7b * -3) = 31
(-6 + -21b) = 31

Solving
-6 + -21b = 31

Solving for variable 'b'.

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

Add '6' to each side of the equation.
-6 + 6 + -21b = 31 + 6

Combine like terms: -6 + 6 = 0
0 + -21b = 31 + 6
-21b = 31 + 6

Combine like terms: 31 + 6 = 37
-21b = 37

Divide each side by '-21'.
b = -1.761904762

Simplifying
b = -1.761904762