a) n×5=6×25
n×5=150
n=150:5=30
b)n×6=12×4
n×6=48
n=48:6=8
c) n×14=24×28
n×14=672
n=672:14=48
d)n×60=40×9
n×60=360
n=360:60=6
e)n×n=3×48
2n=144
n=144:2
n=72
f)(n+1)×24=4×30
(n+1)×24=120
n+1=120:24
n+1=5
n=5-1
n=4
g)2n+1×21=7×15
2n+1×21=105
2n+1=105:21
2n+1=5
2n=5-1
2n=4
n=4:2
n=2
la h și i nu știu..scz
