Răspuns:
Explicație pas cu pas:
Salut!
1.
c)×-4=9
=>x=4+9=15
Proba: 15-4=9
d) 2x=16
=>x=16:2=8
Proba: 8×2=16
e) 10-x=3
=>x=10-3=7
=>×=7
Proba: 10-7=3
2.
c) 8×x=56
=>x=56:8
x=7
Proba: 8×7=56
d)6x+1=19
6x= 19-1
6x=18
=>18:6=3
=>x=3
Proba: 6×3=18
e)78-38-x=24
40-×=24
=>x=40-24=16
Proba:78-38-16=24
f)2×(×-1)-4=12
2×(×-1)=12-4
2×+ 2×(-1)=8
2×+ (-2)=8
2×=8:2
2×=4
×=2
Sper ca te am ajutat!
