102. A+M+P=990
M=110+A
M+P=770
A+770=990=> A=990-770=> Ana=220 lei
M=110+220=> Mihai=330 lei
330+P=770=> P=770-330=> Paul=440 lei
103. 180+a=190=> a=190-180=> a=10
750-c=340=> c=750-340=> c=410
b+220=410=> b=410-220=> b=190
880-d=120=> d=880-120=> d=750
104.numere sunt: 12,24,39,48
105. a) 50+65=115
b) 120+95=215
c) 50+85+95=230
106. nu stiu
sper ca te-am ajutat