Question

Afla numarul necunoscut din exspresiile:36-42:(15:3-4:1)-20=10 al doilea exercitiu11-(7×5-9×9:f:3):8=7 al treilea exercitiu 22-5×(38-4×g)=12al patrulea exercitiu 26+(6×h-7×3):9=27

Answer 1

36-42:e:(15:3-4:1)-20=10 36-42:e:(5-4)=10+20 42:e:1=36-30 42:e:1=6 42:e=6*1 42:e=6 e=42:6 e=7 11-(7*5-9*9:f:3):8=7 (35-81:f:3):8=11-7 (35-81:f:3):8=4 (35-81:f:3)=4*8 35-81:f:3=32 81:f:3=35-32 81:f:3=3 81:f=3*3 81:f=9 f=81:9 f=9 Ex:nr 3 22-5*(38-4*g)=12 5*(38-4*g)=22-12 5*(38-4*g)=10 38-4*g=10:5 38-4*g=2 4*g=38-2 4*g=36 g=36:4 g=9 Ex nr4 26+(6*h-7*3):9=27 (6*h-7*3):9=27-26 (6*h-21):9=1 6*h-21=1*9 6*h-21=9 6*h=9+21 6*h=30 h=30:6 h=5