Question

a)( x+2 8pe 15 ) . 3 pe 2= 5 1pe 4 ??
b)2,18 : y= 109 pe 1000?

Answer 1

2intreg 8/15=(2·15+8)/15=38/15
5intreg1/4=(5·4+1)/4=21/4
(x+38/15)·3/2=21/4
3x/2+114/30=21/4
3x/2=21/4-114/30
3x/2=(21·15-114·2)/60
3x/2=(315-228)/60
3x/2=87/60
3·60x=87·2
180x=174
x=174/180
x=0,9(6)

218/100·1/y=109/1000
218/100y=109/1000
109·100y=1000·218
y=218000/10900
y=20