Question

d-72+19=40 cu ecuatii

Answer 1

d-72+19=40
d-72=40-19
d-72=21
d=21+72
d=93
verificare
93-72+19=40
21+19=40
40=40

Answer 2

d - 72 + 19 = 40
d - 72 = 40 - 19
d - 72 = 21
d = 21 +72
d = 93.