Question

Afla valorile lui a, b, c, stiind ca:
a+b+c=500+9ori4-8ori(7+2) a=...........
a+b=213+6ori7-(9-5)ori4 b=............
b+c=(17-8)ori10+342 c=..............

Answer 1

a+b+c=464 a+b=239 b+c=432 => a=464-239 a= 32 c= 464-239 c=225 b=464-225-32 b=207

Answer 2

in ecuatia a+b+c in locuim b+c=
a+[(17-8)×10+342]=500+9×4-8×(7+2)
a+(90+342)=500+36-72
a+432=536-72
a+432=464
a=32
in ecuatia a+b inlocuim  a-ul
32+b=213+6×7-(9-5)×4
32+b=213+42-4×4
32+b=255-16
32+b=239
b=207
 in ecuatia b+cinlocuim b
207+c=(17-8)×10+342
207+c=90+342
207+c=432
c=225