b) X x 3,7 + X x 6,3 = 120 |
X x ( 3,7 + 6,3 ) = 120
X x 10 = 120
X = 120 : 10
X = 12
Vậy X = 12
a 48
b
c
tự làm đừng hỏi
a) 5 x (4 + 6 x X) = 290 |
4 + 6 x X = 290 : 5
4 + 6 x X = 58
6 x X = 58 - 4
6 x X = 54
X = 54 : 6
X = 9
Vậy X = 9
a)5x(4+6x X)=290
4+6xX=290:5=58
6xX = 58-4=54
X=54:6=9
b)X x 3,7+X x 6,3=120
X x(3,7+6,3)=120
X x 10 =120
X = 120:10=12
c)(15x24: X):0,25=100:1/4
15x24xXx4=400
15x24xX=400:4=100
24xX=100:15=20/3
X=20/3:24=20/72
c) (15 x 24 – X) : 0,25 = 100 : \(\frac{1}{4}\) |
( 360 - X ) : 0,25 = 400
360 - X = 400 x 0,25
360 - X = 100
X = 360 - 100
X = 260
Vậy X = 260.
câu cuối mk sai
c)(360-x)x4=400
360-x=400:4=100
X=360-100=260