Question

1)Efectuati:a) 5 supra 12 (1 supra 2 + 5 supra 6); b)11 supra 6 - 5 supra 2):7 supra 6.
2)Rezolvati in Q,ecuatiile a)x-3,2=1 supra 2; b) 2(x+ 5 supra 4 )=13,2.Dau 20 puncte+coroana!

Answer 1

a) 5/12(1/2+5/6)= 5/12* /3+5/6= 5/12*8/6= 5/12*4/3= 5/3*1/3= 5/9
b) (11/6-5/2):7/6= /11-15/6 :7/6= (-4/6) :7/6= -4/6*6/7= -4*1/7= -4/7
a) x-3.2=1/2
    x=1/2+3.2
    x=0.5+3.2
    x=3.7
b) 2(x+5/4)=13.2
    x+5/4=6.6
    x=6.6-5/4
    x=6.6-1.25
    x=55.35..............