Question

me ajudem; valendo 40 pts (pergunta esta na imagem)

Answer 1

2x+5y=17
x-y=5

x=5+y

2x+5y=17
2(5+y)+5y=17
10+2y+5y=17
7y=17-10
y=7/7
y=1

x-y=5
x-1=5
x=5+1
x=6

Answer 2

2x+5y=17

x-y=5

x=5+y

2x+5y=17

2(5+y)+5y=17

10+2y+5y=17

7y=17-10

y=7/7

y=1

x-y=5

x-1=5

x=5+1

x=6