Answer:
A =
- B
Step-by-step explanation:
Given
R = x(A + B) ← divide both sides by x
= A + B ( subtract B from both sides )
- B = A
150g/12cakes
150/12 = 12.5
12.5g/cake
12.5x30 = 375
Therefore, you need 375g for 30 cakes.
In general if multiplying, move decimal to RIGHT by whatever the exponent is.
In this example 10^1, the exponent = 1
9.4 with decimal moved 1 place to right = 94