Question

afla numerele necunoscute
a. 81:x=3×3
b. 48+x:5=50
c. 50-80:x=40
va rog​

Answer 1

a) 81:x=3×3

81:x=9

x=81:9

x=9

S={9}

b) 48+x:5=50

x:5=50-48

x:5=2

x=5×2

x=10

S={10}

c) 50-80:x=40

80:x=50-40

80:x=10

x=80:10

x=8

S={8}