Question

A)x-y=5
x=2y+1

B)x+y=9
y=x-5

Answer 1

A) x-y=5
x=2y+1
2y+1-y=5
2y-y=5-1
y=4
 x=2.4+1
x=8+1=9

B) x+y=9

x+x-5=9
2x=9+5
2x=14
x=14/2
x=7

y=7-5=2

Answer 2

nao consego le ajuda