Violympic toán 6
Các câu hỏi tương tự
tim x va y, sao cho : (x + 1 ) ( 2y - 1) = 12
8 tháng 3 2019 lúc 19:12
Tim x,y
\(\frac{x-3}{y-2}=\frac{3}{2};x-y=4\)
3)tim x
a)(x-1).(y-2)=5
b)x.(y-3)=12
8 tháng 3 2019 lúc 20:20
Tim x, y
\(\frac{x+3}{y-1}=\frac{3}{4};x+y=5\)
2)tính
a)(-1).(-2).(-3).(-4).(-5).[(-3)-(-5)]
b)1-2+3-4+5-6+...-98+99
3)tim x
a)(x-1).(y-2)=5
b)x.(y-3)=12
Tim x, y biet:
a) x/15=6/y=3/5
b) 6/14=x/-21=-12/y
tim so nguyen x, y\(\dfrac{x}{2}-\dfrac{2}{y}=\dfrac{1}{2}\)
Tim x,a,b nguyen duong thoa man :x+4=3^a va 4x+7=3^b
1. tim cac so nguyen x, y biet
a.\(\dfrac{x}{2}\)bang\(\dfrac{-6}{3}\)
b. \(\dfrac{2}{x}\)bang \(\dfrac{y}{-3}\)
c. \(\dfrac{x}{y}\)bang\(\dfrac{-3}{11}\)
d. \(\dfrac{x}{y-1}\)bang\(\dfrac{5}{-19}\)