20+2N=52
now subtract 20 from each side, to get 2N alone
2N=32
now divide each side by 2
N=16
11 liters of 25% orange juice, 4 liters of 10% orange juice:
1' let x to be 25% orange juice and y be 10% orange juice
2' .25x+.10y=(15).21
3' x+y=15
4' 2.5x+y=31.5 divide all sides by 10
5' -x-y=-15 multiply all sides by -1
6' 1.5x=16.5
7' x=11
8' y=15-11=4
so 11 and 4 are the answers.
Answer:
-5≥x≤-1
Step-by-step explanation:
comment if you would like an explanation for this.
Answer:
{x,y}={8,5}
Step-by-step explanation:
12x + 12y = 156 4x + 6y = 62
Answer:
He needs to save 90.75
Step-by-step explanation:
Take the money the vacation will cost and divide it by the number of months in a year. 1,089 ÷ 12= 90.75
