For the given proportion, find the unknown number n

7/15 = n/6

I'm such a loser. Please help!

You're NOT a loser!

Remember that whenever you solve an equation, you chage the value of each side of the equation in the same way until you isolate your unknown.

OK, let's take a look:


7/15 = n/6 Here, your unknown is divided by 6, so to isolate your unknown, multiply n/6 by 6. 6 X n/6 = n X 6/6 = nX1=n.

(7X6)/15 = n Now (7X6)=(7X3X2) and 15 = (5X3) We can look at this as (7X2)/5 X 3/3, or 14/5 X 1

n = 14/5.

Does this help?

Multiply both sides by 30.

7/15 = n/6
14 = 5n
n = 14/5

2.8/6

15/5*2=6
7/5*2=2.8

just cross multiply
so 7*6= 15*n

so n = 42/15 = 21/5