Tuyển Cộng tác viên Hoc24 nhiệm kì 30 tại đây: https://forms.gle/T8wg79khMGHeXQuDA
\(\Rightarrow2x=\dfrac{143}{2}-15=\dfrac{113}{2}\\ \Rightarrow x=\dfrac{113}{2}\cdot\dfrac{1}{2}=\dfrac{113}{4}\)
2.x + 15 = 143 : 2
2.x + 15 = 71,5
2.x = 71,5 - 15
2.x = 56,5
x = 56,5 : 2
x = 28,25
1.Tìm các số nguyên x:
5/17+-4/9+-20/31+12/17+-11/31<x<=-3/7+7/15+4/-7+8/15+2/3
2. Tính
A=5-10/19+15/143-5/81+8-16/26+24/243-8/181
6-12/19+18/143-6/81+9-18/26+27/243-9/181
a ) A = 1/3 + 1/15 + 1/35 + 1/63 + 1/99 + 1/143
b) x + ( x + 1 ) + ( x + 2 ) + ....+ ( x + 99 ) = 14950
éc ô éc
2/15+2/35+2/63+2/99+2/143
a. 219 - 7(x + 1) = 100 b. ( 3x - 6).3 = 36 c. 716 - (x - 143) = 659
d. 30 - [4(x - 2) + 15] = 3 e. [(8x - 12) : 4].33 = 36
2/15+2/35+2/63+2/99+2/143
tìm 2 stn x,y biết rằng
a, (3x+4).(2y+1)=143
b, (15-2x ).(2y-5)=35
2/15+2/35+2/632/99+12/143+2/195
Giúp mik nha . mk cảm ơn
Tìm x
a. (x-2)×(x+3)<0 với x€Z
b. (1/15+1/35+1/63+1/99+1/143+1/195) ×5x=5+1/3
(5+ 10+15+.....+2015) x (197,3 x 143- 0,9)x ( 2,3x3- 6,9)
