71 x a -a + 3 xa = 365
a x (71 -1 +3) = 365
a x 73 = 365
a = 365 : 73
a = 5
71 x a -a + 3 xa = 365
a x (71 -1 +3) = 365
a x 73 = 365
a = 365 : 73
a = 5
a) 71, 24 = 71, x4
x = .............
b) 5x8, 72 = 598, 72
x = ............
Bài 3: Tính giá trj biẻu thức
a) (25 915 + 3550 : 25) : 71
b) 1029 - 884 : 34 x 21
A) 124+(118-x) =365
B) 814-( x-305 ) =712
C) x -32:16=48
D) (x-32 ):16=48
Tìm x:
a) (X x 0,25 + 1999) x 2000 = ( 53 + 1999 ) x 2000
b) 71 + 65 x 4 = \(\dfrac{x+140}{x}\) + 260
a, 3 x 25 x 8 + 4 x37 x6 + 2 x 38 x12
b, 1 + 6 + 11 +16 + .... + 46 + 51
c, 29 x 87 - 29 x 23 + 64 + 71
Giải ra nhé các bạn
Bài 3 : Tìm y ,x
a) 71 + 65 x 4 = \(\frac{X+140}{X}+260\)
b) y x 15/2 - 1/3 x ( 1/4 + y ) = \(96\frac{2}{3}\)
tim x
a, ( x 0,25+1999).2000=(53+1999).2000
b, 71+65.4=x+140/x+260
a) 01,2 + 2 x 201,2 + 3 x 201,2 + 4 x 201,2
b) 3/1x2 + 3/2x3 + 3/3x4 +...+ 3/99x100
c) 3,54 x 73 + 0,46 x 12,5 + 3,54 x 26 + 0,17 x 25 + 3,54
d) A= 1/2 + 5/6 + 11/12 + 19/20 + 29/30 +41/42 + 55/56 + 71/72 + 89/90
e) 1995 x 1994 - 1/ 1993 x 1995 + 1994
h) 373737/474747 + 5757/4747
tìm y :
a/ y + y : 3 x 4.5 + y : 2 x 76 = 24
b / 71 + 65 x 4 = y + 140 : y + 260