Question

VA ROGGGG URGENTT NUJ SA-L FACC​

Answer 1

Răspuns:

Explicație pas cu pas:

a) x/12=(4+3)/12×7     x=7/7=1

b)x/75=(1-5)/5×4    x/15=-4/4      x=-15

c)3/8=(3+27)/4×(x+1)      1/2=10/(x+1)      x+1=20     x=19

d)(2/10+2/9)/(2x+1)=1/45     2(10+9)/90×(2x+1)=1/45  2x+1=19     x=9

e)2^49(2²-2-1)/2^48=(31×x)/31×2^5     2×1=(31×x)/31×2^5      x=2^6=64

f) x²=8×(14+4)     x²=2³×2×3²         x=2²×3=12