Question

dau coroana cine le rezolva pe toate 4 operatii

Answer 1

a). (y:2)•3=10•3
(y:2)•3=30
y:2=30:3
y:2=10
y=10•2
y=20

b).(7•9-b•5)-9:3=20
(63-b•5)-3=20
63-b•5=20+3
63-b•5=23
b•5=63-23
b•5=40
b=40:5
b=8

c).60-10:(37-4•x)=50
10:(37-4•x)=60-50
10:(37-4•x)=10
37-4•x=10:10
37-4•x=1
4•x=37-1
4•x=36
x=36:4
x=9

d).20•30•40•a=0
a=0