Question

Aflati numarul natural x , stiind ca urmatoarele fractii sunt echivalente :
a ) x + 2 supra 4 si 7 supra 2
b ) 6 supra x + 4 si 3 supra 4
c ) x - 7 supra 6 si 3 supra 2
d ) 5 supra 3 = x - 3 supra 9 !
Va rog frumos .... E URGENT !
Va rooog !!

Answer 1

a. x+2  /  4 = 7/2
    x+2=14, x=12
b. 6*4=3(x+4), 24=3x+12, 3x=12, x=4
c. 2(x-7) = 6*3, 2x-14=18, 2x=32, x=16
d. 5*9=3(x-3), 3x-9=45, 3x=54, x=18

Answer 2

a) x+2/4=7/2 2(x+2)=28 x+2=28:2 x+2=14 x=14-2 x=12 b) 6/x+4 =3/4 3(x+4)=6×4 x+4=24:3 x+4=8 x=8-4 x=4 c)x-7/6=3/2 2(x-7)=6×3 x-7=18:2 x-7=9 x=9+7 x=16 d)5/3=x-3/9 3(x-3)=5×9 x-3=45:3 x-3=15 x=15+3 x=18