Question

considere o método da substituição e resolva

Answer 1

a) x+y=24
x-3y= -16

x=24-y

x-3y=-16
(24-y) -3y=-16
24-4y=16
-4y=16-24
-y=-8/4 .(-1)
y=2

b)

Answer 2

A) 24 + 24=  48  -16 - 3.(-16)= -16 +64= +16 B)0 -0y= 0 6+5.(+6)= 6+39=+45 C)3. (8) +8= 24+8= +32 6+3.(6)=  6+18= +24