Question

y=8
y=4x-24
metodo de substituiçao

Answer 1

Resposta:

y=4x-24

8=4x-24

-4x=-24-8

-4x=-32 .(-1)

4x=32

x=32/4

x=8

P/×=8

y=4.8-24

y=32-24

y=8

Answer 2

y=8

8=4x-24

-4x=-24-8

-4x=-32

x=-32/-4

x=8

(8,8)

Prova real:

8=8

8=4(8)-24

8=32-24

8=8

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