x/-15=-60/x
=> x.x = [-15]. [-60]
=> x^2 = 900
=> x= 30 hoặc -30
-2/x = -x/8
=> -x^2 = -16
=> x^2 = 16
=> x= -4 hoặc 4
Tìm x:
1/2+3/2 x+x=16
TIM X,BIET
-X/15=-60/X
1 tim cac so nguyen x,y biet x/7=6/21 -5/y=20/28 1/2=x/12 x/8=-28/32 3/y=12/24 3/4=15/y 2 viet 3 phan so bang phan so -10/15
tim x , y tu nhien biet (x^2+1)(2^x+2)(2^x+3)(2^x+4) +15^y=1679
tim x biet :3/[x+2][x+5]+5[x+5][x+10]+7/[x+10][x+15]=x/[x+12][x+17]
tim x va y biet
a)x/18=y/15 va x-y=-30
b)7*x=9*y va 10*x-8*y=68
c)(x1/2)^50 +(y+1/3)^40=o
tim x biet
x+15+2+3=30
a, Cho F(x) = a x+b . Tim a,b biet f(0) = 3 va F(2) =-1
b, Cho F(x) =a x+ b. Tim a,b biet F(1) = -1 va F(-2) = 8
c, Cho F(x) =a x +b .tim a,b biet F(0) = 1 va F(-2) = -9
tim x va y biet
x/y=17/3va x+y=60
tim x,y biet:25-y2=8(x-2022)2