Question

afla numarul necunos din fiecare expresie, dupa exemplu
720:a=450:3=240
720:a=240-150
720.a=90
a=720:90
a=8


1.a+190+190:10=300
2. 572-b imultit 32-45=50
3. c-9600-315:9)335
4.20 imultit e-(1950+550):2=551

Answer 1

a+190+19=300
a+190=300-19
a+190=281
a=281-190
a=91

2).572-bx32-45=50
572-32b-50+45
572-32b=95
572-95=32b
477=32b
b=477:32=14,906

3).c-9600-315:9

4).20e-2500:2=551
20e-1250=551
20e=551+1250
20e=1801
e=1801:20=90,05