Question

6a+18b=0
2a+6b=4
Me ajudem, por favor!

Answer 1

6a+18b=0

2a+6b=4

2a=4-6b

6(4-6b)+18b=0

24-36b+16b=0

24=20b

b= 20/24

b= 5/6

PROVA REAL.

6a+18.5/6=0

6a+90/6=0

90/6= -6b

90 = - 36b

b= 90/36 ou 5/2