Two times a number added to another number is 25. three times the first number minus the other number is 20. find the two numbers

x=9, y=7

Step-by-step explanation:

2x+y=25

3x-y=20 let's sum these two equations respectively

2x+3x+y-y=25+20

5x=45

x=45/5=9

let's put the value of ex on its place in the first equation

2*9+y=25, 18+y=25, y=25-18=7

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

30 feet

step-by-step explanation:

that would be 2 1/2 * 12

= 24 + 6

= 30 feet   (answer)