3=m(4)+b

Solution for 3=m(4)+b equation:

Simplifying
3 = m(4) + b

Reorder the terms for easier multiplication:
3 = 4m + b

Reorder the terms:
3 = b + 4m

Solving
3 = b + 4m

Solving for variable 'b'.

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

Add '-1b' to each side of the equation.
3 + -1b = b + -1b + 4m

Combine like terms: b + -1b = 0
3 + -1b = 0 + 4m
3 + -1b = 4m

Add '-3' to each side of the equation.
3 + -3 + -1b = -3 + 4m

Combine like terms: 3 + -3 = 0
0 + -1b = -3 + 4m
-1b = -3 + 4m

Divide each side by '-1'.
b = 3 + -4m

Simplifying
b = 3 + -4m