2b+4.3-b=90

Solution for 2b+4.3-b=90 equation:

Simplifying
2b + 4.3 + -1b = 90

Reorder the terms:
4.3 + 2b + -1b = 90

Combine like terms: 2b + -1b = 1b
4.3 + 1b = 90

Solving
4.3 + 1b = 90

Solving for variable 'b'.

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

Add '-4.3' to each side of the equation.
4.3 + -4.3 + 1b = 90 + -4.3

Combine like terms: 4.3 + -4.3 = 0.0
0.0 + 1b = 90 + -4.3
1b = 90 + -4.3

Combine like terms: 90 + -4.3 = 85.7
1b = 85.7

Divide each side by '1'.
b = 85.7

Simplifying
b = 85.7