Question

Arata ca, daca a=7ori7-3ori3-5ori6 b=63impartit7+5ori4--3ori3 c=42impartit6+5ori6+3ori1 atunci 6ori a-2ori b+c=4ori a+3ori b-c

Answer 1

a=7×7-3×3-5×6
a=49-9-30
a=40-30
a=10

b=63÷7+5×4-3×3
b=9+20-9
b=29-9
b=20

c=42÷6+5×6+3×1
c=7+30+3
c=37+3
c=40

6×10-2×20+40=4×10+3×20-40
60-40+40=40+60-40
20+40=100-40
60=60