Question

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Answer 1

x+3y=6

5x-2y=13

1.x+3y=6

x=6-3y

2.5x-2y=13

5x=13+2y

x=13+2y/5

x=x

6-3y=13+2y/5

5(6-3y)=13+2y

30-15y=13+2y

30-13=2y+15y

17=17y

17/17=y

1=y

x=6-3y

x=6-3(1)

x=3

(1,3)

x+6y=27

(2)7x-3y=9

x+6y=27

14x-6y=18

15x=45

x=45/15

x=3  

x+6y=27

3+6y=27

6y=27+3

y=30/6

y=5