Question

Faceti varog urmatoarea operatie:

4b-0,6=a


iar a+b=3,72

Answer 1

4b-0,6+b=3,72
3b=3,72+0,6
b=4,32:3
b=1,44
4 x 1,44 - 0,6=5,76-0,6=5,16

Answer 2

4b-0.6=a
a+b=3.72
a=3.72-b
4b-0.6=3.72-b
4b+b=3.72+0.6
5b=4.32
b=0.864
a=3.72-0.864=2.856