x8y11 y7x20 and if aecessaty fi n the anseb answer Tho sy Te

-x-8y=-11
y=7x-20

and if aecessaty, fi \'n the anseb answer Tho sy Tem bas a sin sytem has a single solution. The soleroetisped i bers ars infinitel wnw w siens an die sqcuations are deh Tue svstedn & mcsse hesohiaon set is the eapty set

Solution

Given equations are -x-8y=-11

y=7x-20   

These equations can be written as x+8y=11

7x-y=20

Multiply the second eqution with 8, then 8*(7x-y=20)

56x-8y=160

Add x+8y=11 with 56x-8y=160

Then x+8y+56x-8y=11+160

57x=171

x=3

substitute \'x\' in x+8y=11 and find \'y

x+8y=11

3 +8y =11

8y=11- 3

8y=8

y=1

Hence x=3 & y=1

So,the answer is the first option A.

The system has a simple solution.The solution set is {3,1}