49 : x + 56 : x = 7. Tìm x
Tìm x biết:
49:x+56:x=7
49:x+56:x=7
<=>(49+56):x=7
<=>105:x=7
=>x=105:7
=>x=15
Tìm x biết:
a, (x-23)×7 = 49
b, 25÷(x-56) = 5
Bài 3. Tìm x. x/36 = 3/4 ; x/7 = 56/49 ; 15/27 = 5/x ; 3/7 = 42/x
Tìm x
A 49:X+56:X=7
b (390:x-90:x)=3
Sai rùi bạn
49 ko chia hết cho 15
90 ko chia hết cho 100
tìm x
a, 12x +69-23 =109
b, 56/x +49=7
a) 12x + 69 - 23 = 109
12x + 46 = 109
12x = 63
x = 21/4
b) 56/x + 49 = 7
56/x = -42
x = 56/-42
x = -4/3
12x+69-23=109
12x+69=109+23
12x+69=132
12x-132-69
12x=63
x=63/12
x=21/4
56/x+49=7
x+49=56/7
x+49=8
x=8-49
x=-41
kick nha minh nhanh nhat
\(12x+69-23=109\)
\(\Rightarrow12x+46=109\)
\(\Rightarrow12x=63\)
\(\Rightarrow x=\frac{63}{12}\)
\(\Rightarrow x=5,25\)
b) \(\frac{56}{x}+49=7\)
\(\Rightarrow\frac{56}{x}=-42\)
\(\Rightarrow-42x=56\)
\(\Rightarrow x=\frac{-4}{3}\)
Tìm x biết, a/ 49:x+56:x=7
b/ (390:x - 90:x)=3
a) 15
b) 100
~HT~
k cho mik nha
\(a,49:x+56:x=7\)
\(\Rightarrow\left(49+56\right):x=7\)
\(\Rightarrow105:x=7\)
\(\Rightarrow x=15\)
Vậy: \(x=15\)
\(b,390:x-90:x=3\)
\(\Rightarrow\left(390-90\right):x=3\)
\(\Rightarrow300:x=3\)
\(\Rightarrow x=100\)
Vậy: \(x=100\)
49:x+56:x=7
=
49 : x + 56 : x = 7
(49 + 56) : x = 7
105 : x = 7
X = 105 : 7
X = 15
Vậy x = 15
49 : X + 56 : X = 7
(49 + 56) : X = 7
105 : X = 7
X = 105 :7
X = 15
Vậy X = 15
Đúng nha em !
\(49:x+56:x=7\)
\(\left(49+56\right):x=7\)
\(105:x=7\)
\(x=105:7\)
\(x=15\)
Vậy \(x=15\)
Tính nhẩm
7 x 8 =
7 x 9 =
7 x 6 =
7 x 7 =
56 : 7 =
63 : 7 =
42 : 7 =
49 : 7 =
7 x 8 = 56
7 x 9 = 63
7 x 6 = 42
7 x 7 = 49
56 : 7 = 8
63 : 7 = 9
42 : 7 = 6
49 : 7 = 7
Tìm x, biết :
a. 49 : x + 56 : x = 7 Giair chi tiết nha .
b) (390 : x - 90 : x) = 3
giair chi tiết cho tui nha