Question

7. If 2x + y = 23 and 4x – y = 19, find the values of 5y – 2x and y/x - 2

Answer 1

Answer:

the values of (5y-2x)and (yx−2) and 31 and −57 respectively.

Step-by-step explanation:

Given equations are

2x+y=23 ...(i)

and 4x−y=19 ...(ii)

On adding both equations, we get

6x=42⇒x=7

Put the value of x in Eq. (i) , we get

2(7) + y =23

⇒ 14+y=23

⇒ y=23−14

⇒ y=9

We have,  5y−2x=5×9−2×7

=45−14=31

and  yx−2=4x−2=97−2=9−147=−57

Hence, the values of (5y-2x)and (yx−2) and 31 and −57 respectively.