We'll start with the expression for the quotient of 
and 
, which means we'll use division:
Now we find 
less than that, meaning we'll use subtraction:
X-3/8=3/6
Add 3/8 to both sides, to leave the variable alone
X= 3/6-3/8
Use common denominators-8 (3/6 is 1/2)
X= 4/8-3/8
X=1/8
700-175=525
525:35=15
He must save $35 during 15 weeks to have his new computer
Answer:
78 + B = 91...
91 - 78 = B
91 - 78 = 13
B = 13
Step-by-step explanation:
A proportion is an equal ratio (or fraction)
18 divided by 18 is 1
72 divided by 18 is 4
so a proportion of 18:72 is 1:4
