Răspuns :
a) 4x= 17-5=12=> x= 12:4= 3
b) 2x=49-13= 36=> x=36:2= 18
c) 2x= 7-5=2=>x =2:2=1
d) 12x=1021-25= 996=> x=996:12=83
e) 3x=19-4=15=> x=15:3=5
f) 3x=45+21=66=>x=66:3=22
g)5x=23+72=95=> x=95:5=19
h) 4x=116-80=36=> x=36:4=9
i)7x=320-243=77=> x=77:7=11
b) 2x=49-13= 36=> x=36:2= 18
c) 2x= 7-5=2=>x =2:2=1
d) 12x=1021-25= 996=> x=996:12=83
e) 3x=19-4=15=> x=15:3=5
f) 3x=45+21=66=>x=66:3=22
g)5x=23+72=95=> x=95:5=19
h) 4x=116-80=36=> x=36:4=9
i)7x=320-243=77=> x=77:7=11