Question

Va rog ajutatima la ex 23 a,b,f,g,h,i!

Answer 1

a)x/(5/2)=1/4
2x/5=1/4 =>2x=5/4 =>x=5/8

b)(13/8)·(10/19)=x/(49/18)
65/36=18x/49 =>18x=(65·49)/36 =>18x=3185/36 =>x=3185/648

f)1/2 · 3=(x+4)/(10/3)
3/2=3(x+4)/10 =>30=6x+24 =>6x=6 =>x=1

g)17(4x-1)/3=17/10 · 3/4
(68x-17)/3=51/40
40(68x-17)=153 =>2720x-680=153 =>2720x=833 =>x=833/2720

h)(32/9 + 48/9)/(1003/900 - 2/9)=(x+1)/(1/3 + 6/5 · 9/2)
(80/9)/(1003-200)/900=(x+1)/(1/3 + 27/5)
(80/9)/(803/900)=15(x+1)/86
80/9 · 900/803=(15x+15)/86
8000/803=(15x+15)/86
8000·86=803(15x+15)
688000=12045x+12045 =>x=(688000-12045)/12045 =>x=675955/12045
x=135191/2409

i)(50-5)/(1/16)=(2x-4)/(1/5)
45·16=5(2x-4)
720=10x-20 =>10x=740 =>x=74