Question

2/3 care vreti voi !!!!!!!!!!!!!!!!!!

Answer 1

2)
2a+3b=4689
a=3xb
2(3xb)+3b=4689
6b+3b=4689
9b=4689
b=4689:9
b=521
a=3x521
a=1563
V: 2x1563+3x521=3126+1563=4689
3)
3f+4t=182 lei  (mingi fotbal+mingi tenis)
7f+4t=382 lei
(7f-3f)+(4t-4t)=382-182
4f=200
f=200:4
f=50 lei costa o mingr de fotbal
3x50+4xt=182
150+4xt=182
4xt=182-150
4xt=32
t=32:4
t=8 lei costa o minge de tenis