Question

in 3 cosuri sunt 1278 nuci.in primul si in al doilea 630,in al doilea si in al treilea sunt 797.cate nuci sunt in fiecare cos?

Answer 1

a+b+c=1278
a+b=630
b+c=797
a+b=630->a=630-b
630-b+b+c=1278->c=1278-630->c=648
b+c=797->b+648=797->b=797-648->b=149
a+b=630->a+149=630->a=630-149-.=>a=481
481+149+648=1278