Question

Can anybody help me please

Answer 1

first box is 3. second box is 9. third box is 3

Explanation:

x+3y=9

you need to substitute

so

0+3(3)=9

9+3(0)=9

3+3(2)=9

Answer 2

y = 3; x = 6; x = 3

Explanation:

x + 3y = 9

(a) x = 0

0 + 3y = 9

3y = 9

y = 3

(b) y = 0

x + 3(0) = 9

x + 0 = 9

x = 9

(c) y = 2

x + 3(2) = 9

x + 6 = 9

x = 3