Question

x+y=7 and 5x+2y=20 find x and ​

Answer 1

Answer:

x+y=7

5x+5y=35

5x+2y=20

subtracting,

5y-2y=35-20=15

3y=15

y=15/3=5

x+y=7

x=7-y=7-5=2

so, x=2,y=5

Answer 2

Answer:

x + y = 7

x = 7 - y

5x+2y=20

5(7- y) + 2y = 20

35 - 5y + 2y = 20

35 - 3y = 20

- 3y = 20 - 35

- 3y = -15

y = 5 ans.

x = 7 - y

x = 7 - 5

x = 2 ans.

Step-by-step explanation:

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