Question

23) +3.(-12).x=72
24) 18:(-1).(-9)-15

Answer 1

Resposta:

23) +3 . (-12) . x = 72

-36 . x = 72

-36x = 72 .(-1)

36x = -72

x = -72 / 36

x = -2

24) 18 ÷ (-1) . (-9) - 15 =

18 ÷ 9 - 15 =

2 - 15 = -13