TIM X
a) (7/2+2x)x8/3=16/3
b) [2x+3]=5
c) x-2/4=5+x/3
lam on giup toi nhe ban
tinh:1+3+5+7+...+n=36
HAY GIUP TOI VOI LAM ON ! LAM ON HAY TIM CACH NHANH NHAT . CAM ON CAC BAN , TOI DOI ON CAC BAN SUOT DOI
Tình hợp lý nếu có thể :
-5/2x 2/11+-5/7x 9/11+15/7
Tìm x biết:
(2x-15)mũ 5=(2x-15)mũ 3
15+2X=3^80:3^17
CO AI LAM ON GIUP TO VOI TO SE KET BAN VOI NGUOI DA GIUP TO
XIN HAY GIUP MINH VS MINH KO CON NHIEU THOI GIAN DAU PLEASE PLEASE PLEASE
Her name ( be ) ... Lan. She ( be ) ... a nurse. She ( work ) ... in a hospital. She ( be ) ... twenty five years old. She ( go ) ... to work 5 days a week. Shework (start) ... at 7:00 o' clock and (finish) ... at 5:00.She and her friends (have) ... lunch in a canteen. She (come)... back home at 5:15
LAM ON LAM ON LAM ON HAY GIUP MINH MINH HUA SE TICK DO
PLEASE
Tìm x:
1) 2x + 12 = 3(x - 7)
2) -10 + 2 (x + 1) = 4x - 8
3) -5 - (24 - 2x) = = -11 + x
4) 2(x - 5) - 3(x + 7) = 14
5) 4(x + 3) - 5(2 - x) = 10x - 15
1.Tính nhanh nếu có thể:
a) 22 + 23 + 89 + 77
b) 35 . 15 + 15 . 65
c) 72 - 36 : 32
d) 476 - {5 . [409 - (8 . 3 - 21)2] - 1724}
2. Tìm x, biết:
a) x + 37 = 50
b) 2x - 3 = 11
c) (x - 105) : 21 = 15
3. Tìm số tự nhiên x,y biết:
a) 56x chia hết cho 2
b) 34y chia hết cho 2 và 5
4. Cho A = 2 + 22 + 23 + ... + 220
Chững minh A chia hết cho 3
tim so du
a12^13 cho 5
b14^15 cho 5
giup toi lam bai nay nha
tìm x,y biết :
a, 3 - 2x = 3.(5-x) + 4
b, 4 - ( 7x + 2017 ) = 6 . ( 5-x) - 2017
c, 15 - x (x+1) = 4 - x^2 + 2x
d, -4.(x-5) + 2016 = 3.(8-x)-(2x - 2016)