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a fost răspuns

a] 2x+13=49
b] 2x+5=7
c] 25+12x=1021
d] 3x+4=19
e] 3x-21=45
f] 5x-23=72
i] 320-7x=243
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Răspuns :

Moicampari
a)49-13=36
36:2=18
b)7-5=2
2:2=1
c)1021-25=996
996:12=83
d)19-4=15
15:3=5
e)45+21=66
66:3=22
f)72+23=95
95:5=19
g)320-243=77
77:7=1