Các câu hỏi tương tự
Tìm x biết:
(x+2)/11 + (x+2)/12 + (x+2)/13 = (x+2)/14 + (x+3)/15
Tìm x biết:
a)\(\frac{x+1}{10}+\frac{x+1}{11}+\frac{x+1}{12}=\frac{x+1}{13}+\frac{x+1}{14}\)
b)\(\frac{x+1}{14}+\frac{x+2}{13}=\frac{x+3}{12}+\frac{x+4}{11}\)
12 tính nhanh
(-2)x(-3)x(-4)x(-5)x(-6)x(-7)
(-11)x(-12)x(-13)x(-14):((-13)x(+14))
(-1)x(5³ -(-4)³
Tìm x giúp tớ nghe mọi người x+2/11 + x+2/ 12 + x+2/ 13 = x+2/ 14 + x+2/15
Bài 13: Tìm x biết: a) (x-2)(x-3)-D0. b) (x-3)(x-4)-0. c) (x-7)(6-x)=0. d) (x-3)(x-13)=0. The Bài 14: Tìm x biết: a) (12-x)(2-x)=0. b) (x-33)(11-x)=0. c) (21-x)(12-x)=0. d) (50-x)(x-150) =0. Bài 15: Tìm x biết: a) 2x +x = 45. b) 2x +7x = 918. c) 2x+3x 60+5. d) 11x+22x 33.2.
x+1/10 +x+1/11 +x+1/12=x+1/13 + x+1/14
x+3/10+x+3/11+x+3/12=x+3/13+x+3/14
Tìm x biết \(\frac{x+1}{10}+\frac{x+1}{11}+\frac{x+1}{12}=\frac{x +1}{13}+\frac{x+1}{14}\)
tìm biết :
\(\frac{x+2}{17}+\frac{x+14}{15}+\frac{x+6}{13}=\frac{x+8}{11}+\frac{x+10}{9}\frac{x+12}{7}\)