Question

Solve n/5=18/30, for the unknown quantity, n

Answer 1

n=3

n/5=18/30 This is the same as:

6n/30=18/30

eliminate 30 from both sides

6n=18

n=3

Answer 2

n/5 = 18/30

We can cross-multiply to find n.

5(18) = 30n

90 = 30n

Divide both sides by 30 to find n.

90/30 = 30n/30

3 = n

Done.