Question

a) x²+y=
b)x²-y²=
c) x/y=
d)x²+y²=​​

Answer 1

Explicação passo-a-passo:

x=40-y (tracando o y de lugar)

40-y-y=20

-2y=-20

y=10

x+10=40

x=30

x=30

y=10

A)30²+10

900+10=910

B)30²-10²

900-100=800

C)30/10=3

D)30²+10²

900+100=1000