8*(x-106)=1087*6
tìm x biết (x-106)*8=1087*8
(x-106)*8=1087*8
Cùng chia cho 8 ta có :
x - 106 = 1087
=> x = 1087 + 106
=> x = 1193
(x - 106) x 8 = 1087 x 8
x -106 = 1087
x = 1087 + 106
x=1193
4 | + | 4 | + … + | 4 | = | |
4 x 6 | 6 x 8 | 106 x 108 |
x+6X2+X=1087-987
1087:7= 8386:8= 9765:9= 8765:6= 9802:9=
1087:7=155(du 2)
8386:8=1048(du 2)
9765:9=1627(du 3)
8765:6=1460(du 5)
9802:9=1089(du 1)
Mấy cái đó tự tính được mà!
Bn bấm máy đi cho nhanh.
1087:7=155(dư2)
8386:8=1048(dư2)
9765:6=1627(dư3)
8765:6=1460(dư 5)
9802:9=108=1089(dư 1)
Đặt tính rồi tính:
72 x 3 116 x 6 106 x 8
x +110/100 + x+8/102 + x+6/104 =x+4/106 x+2/108
\(\frac{x+110}{100}+\frac{x+8}{102}+\frac{x+6}{104}=\frac{x+4}{106}+\frac{x+2}{108}\)
\(\Leftrightarrow\frac{x+110}{100}+\left(\frac{x+8}{102}+1\right)+\left(\frac{x+6}{104}+1\right)=\left(\frac{x+4}{106}+1\right)+\left(\frac{x+2}{108}+1\right)\)
\(\Leftrightarrow\frac{x+110}{100}+\frac{x+110}{102}+\frac{x+110}{104}=\frac{x+110}{106}+\frac{x+110}{108}\)
\(\Leftrightarrow\frac{x+110}{100}+\frac{x+110}{102}+\frac{x+110}{104}-\frac{x+110}{106}-\frac{x+110}{108}=0\)
\(\Leftrightarrow\left(x+110\right)\left(\frac{1}{100}+\frac{1}{102}+\frac{1}{104}+\frac{1}{106}+\frac{1}{108}\right)=0\)
\(\Leftrightarrow x+110=0\) (vì \(\frac{1}{100}+\frac{1}{102}+\frac{1}{104}-\frac{1}{106}-\frac{1}{108}>0\))
\(\Leftrightarrow x=-110\)
Vậy \(x=-110\)
x +110/100 + x+8/102 + x+6/104 =x+4/106 x+2/108
Đặt tính rồi tính:
a) 106 x 8
b) 480 : 6
trong day so duoc viet tu 1 den 1087 co bao nhieu chu so:12345678910....1087