one Brian's item cost: x
one Chris' item cost: x+2.5
Set up equation:
Brians amount = Chris amount
4*x = 3*(x+2.5)
solve for x:
4x = 3x + 7.5
x = 7.5
Brian's items cost $7.5 each.
Check:
Brian paid 4*7.5 = $30
Chris paid 3*10 = $30
The individual cost of Brian's items was $7.50, and the indiv. cost of Chris' items was $10.
Answer:
value of x is 4
Step-by-step explanation:
12x-3=17+7x
12x-7x=17+3
5x=20
x=4
Answer:
18
Step-by-step explanation:
Look at all factors of 9 that are even; 18, 36, 54, 72, 90
Next divide 198 by those numbers and the only whole number is from 18.
9 x 2 = 18
198/18 = 11
Consider, cost of one bag of cotton candy=x
cost of one souvenir cup = y
Now, 4x+2y=36 , 2x+y=18------(I)
7x+3y=59-------(ii)
in (I), y=18-2x, substitute it in (ii),
7x+3(18-2x)=59
7x+54-6x=59
x=5, substitute it in equation (I),
2(5)+y=18
y=8....ANS
Have you try added them then divided?