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x*120=15
x=0,125
x=12,5%
zad2
8%*175cm= 0.08*175cm=14cm
175cm+14cm=189cm
175+ 8% *175=175+0.08*175=175+14=189[cm]
100%---------120
X--------------15
X= 100x15/120
X=1500/120
X=12,5%
zad2
100%--------175
8%------------X
X=8x175/100
X= 1400/100
X=14
175+14=189cm
maciek ma teraz 189 cm wzrostu.
licze na najlpesze ;)