Question

no.7 please solve fast

Answer 1

(a,a-2) let it be (x ,y)

3x+5y=30

3(a)+5(a-2)=30. ( substitute a in x and a-2 in y)

3a+5a-10=30

8a=40

a=5

So the points would be

(a,a-2)

(5,5-2)

(5,3)

Hope it helps

Answer 2

3(a)+5(a-1)=30

3a +5a-5=30

8a=30+5

a=35/8

a=4.375

hope it is correct