Question

folosind cele trei metode, rezolvati
ecuatiile :
a) ×+3=7
b) ×-4=9
c) 2×+4=10

Answer 1

x= 7-3=4
x=9+4=13
2x=10-4; x=6:2=3

Answer 2

a) x=7-3
    x=4
     4+3=7 2x=10-4

b) x=9+4
    x=13
    13-4=9
c) 2x=10-4