Question

Arata ca daca
a=7×7-3×3-5×6
b=63:7+5×4-3×3
c=42:6+5×6+3×1
Atunci:
6×a-2×b+c=4×a+3×b-c

Answer 1

a=49-9-30
a=40-30
a=10
b=9+20-9
b=29-9
b=20
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