Make x the subject of the formula a=b (1-x)

x = - (a - b) / b

Step-by-step explanation:

Solve for x:

a = b (1 - x)

a = b (1 - x) is equivalent to b (1 - x) = a:

b (1 - x) = a

Divide both sides by b:

1 - x = a/b

Subtract 1 from both sides:

-x = (a - b) / b

Multiply both sides by - 1:

Answer: x = - (a - b) / b