tìm x biết:
a/ 3/2*x-70/10/11:(131313/151515+131313/353535+131313/999999)=-5
b/ 0,25*x*(8/5:1/1/2+1/50)=7/50*(2,91+0,09)*4
c/ (2/11*13+2/13*15+...+2/19*21) *462-(0,04:(x + 1,05)):0,12=19
(2/11.13+2/13.15+....+2/19.21).462-(0,04:(x+1,05)):0,12=19
tìm x biết
\(\left(\frac{x}{11.13}+\frac{2}{13.15}+...+\frac{2}{19.21}\right)-462-\left[0,04:\left(x+1,05\right)\right]:0,12=19\)19
ai nhanh mik tick, help me
(2/11.13+2/13.15+.......+2/19.21).462 -{2,04:(x+1,05):0,12=19
tìm x biết
\(\left(\frac{2}{11.13}+\frac{2}{13.15}+...+\frac{2}{19.21}\right).462-\left[0,04:\left(x+1,05\right)\right]\)
Tim x
(2/11.13+2/13.15+...+2/19.21).462-[2,04:(x+1,05)]:0,12=19
giúp mình với mình đang cần gấp .
bài toán 1-{2-[3-4(5-x 0]}=2013
bài toán 0,25x.(9/5:1 1 phần 2 ( hỗn số ) + 4/50) = 7/60(2,91+0,09).4
tìm X biết
\(\left(\frac{x}{11.13}+\frac{2}{13.15}+...+\frac{2}{19.21}\right)-462-\left[0.04:\left(x+1,05\right)\right]:0,12=19\)