X × 25 + x × 74 + x = 200
25 × x - x = 14040 : 45
x : 55 = 14,3
25*X-X=14040/45
25* x- x=14040:45
25x-x=312
24x=312
x=312:24
x=13
25* x- x=14040:45
25x-x=312
24x=312
x=312:24
x=13
25 × X - X = 14040 : 45
25 x X - X = 14040 : 45
25 x X - X x 1 = 14040 : 45
25 x X - X x 1 = 312
( 25 - 1 ) x X = 312
24 x X = 312
X = 312 : 24
X = 13.
25 x X - X= 14040 : 45
24 x X= 312
X= 312 : 24
X= 13
Vậy X=13
25 x X - X = 14040 : 45
25 x X - X = 312
25 x X - 1 x X = 312
24 x X = 312
X = 312 : 24
X = 13
25 x y - y = 14040 : 45
Tìm x, biết: 3 2 + 4 5 x − 3 4 = 7 4
25* x- x=14040:45
x*2=15-x*3
giúp mình trả lời hai câu hỏi này nhé !
a)25* x- x=14040:45
25x-x=312
24x=312
x=312:24
x=13
b)x*2=15-x*3
2x=15-3x
2x+3x=15
5x=15
x=15:5
x=3
a)25* x- x=14040:45
25x - x=312
24x = 312
x=312:24
x=13
b)x*2=15-x*3
2x=15-3x
2x+3x=15
5x=15
x=15:5
x=3
Tìm Y biết 25 x Y- Y=14040:45
( x + 74 ) - 318 = 200
[ ( x - 29 ) - 11 ] : 2 = 8
3636 : ( 12x - 91 ) = 36
[ ( 250 - 25 ) : 15 ] : x = ( 450 - 60 ) : 130
[ ( 4x + 28 ) . 3 - 55 ] : 5 = 35
(x+74) - 318=200
x+74 =200+318
x+74 =518
x =518-74
x = 444
[ (x-29) - 11 ] : 2 = 8
[ (x-29) - 11 ] = 8x2
[ (x-29) - 11 ] = 16
x-29 = 16 + 11
x-29 = 27
x = 27 + 29
x = 56
3636 : (12x -91) =36
12x-91 =3636 : 36
12x-91 = 101
12x = 101 + 91
12x = 192
x = 192 : 12
x = 16
[ ( 250 - 25 ) : 15 ] : x = ( 450 - 60 ) : 130
[ 225 : 15 ] : x = 390 : 130
15 : x = 3
x = 15 : 3
x = 5
[ ( 4x + 28 ) . 3 - 55 ] : 5 = 35
[ ( 4x + 28 ) . 3 - 55 ] = 35 : 5
[ ( 4x + 28 ) . 3 - 55 ] = 7
( 4x + 28 ) . 3 = 7 + 55
( 4x + 28 ) . 3 = 62
( 4x + 28 ) = 62 : 3
SAI ĐỀ RỒI TÍNH KO RA
55 x 55 =
75 x 65 =
25 x 25 =
35 x 35 =
55 x 55 =3025
75 x 65 =4875
25 x 25 =625
35 x 35 =1225
55 x 55 =3025
75 x 65 = 4875
25 x 25 =625
35 x 35 = 1225
tính nhanh : 258,93 x ( 76,1 - 14,3 ) - 158,93 x ( 72+ 4,1 ) + 258,93 x 14,3
258,93 x ( 76,1 - 14,3 ) - 158,93 x ( 72+ 4,1 ) + 258,93 x 14,3
=258,93 x ( 76,1 - 14,3 +14,3) - 158,93 x 76,1
=258,93 x 76,1 - 158,93 x 76,1
=(258,93 - 158,93) x 76,1
=100 x 76,1
=7610