cau 61 *la the nao
nhanh tra loi cho
61x(126:x)=2562
126:x=2562:61
126:x=42
x=126:42
x=3
61 . (126 : x) = 2562
(126 : x) = 2562 : 61
126 : x = 42
x = 126 : 42
x = 3
21ab : ab = 31
21 . ab = 31. ab
Cai Quan Que gi vay ! 21 . ab = 31 . ab
=> ab = (ko co)
Ban tu trinh bay nha ! Mong ban thong cam !
a,\(61.\left(126:x\right)=2562\)
\(=>126:x=2562:61=42\)
\(=>x=\frac{126}{42}=3\)
b,\(21ab:ab=31\)
\(=>21=31\left(vl\right)\)
\(=>x\in\varnothing\)
