a:=>x+52=99
hay x=47
b: =>73-x=51
=>x=22
c: =>201x=603
hay x=3
d: =>x:82=16
=>x=1312
ko ghi lại đề
\(a,x+52=99\\x=99-52\\ x=47 \)
\(b,73-x=51\\ x=73-51\\ x=22\)
\(c,201.x=464+139\\ 201.x=603\\ x=603:201\\ x=3\)
\(d,x:82=35-19\\ x:82=16\\ x=16.82\\ x=1312\)
\(e,x+239=55.12\\ x+239=660\\ x=660-239\\ x=421\)
\(a, x+52=1485:15\)
\(x+52= 99\)
\(x= 99-52\)
\(x= 47\)
\(b,73-x=17.3\)
\(73-x= 51\)
\(x= 73-51\)
\(x= 22\)
\(c,201.x-139=464\)
\(c,201.x=464+139\)
\(201.x= 603\)
\(x= 603:201\)
\(x=3\)
\(d,x:82+19=35\)
\(x:82=35-19\)
\(x:82= 16\)
\(x= 16.82\)
\(x= 1312\)
\(e,(x+239):12=55\)
\(x+239=55.12\)
\(x+239= 660\)
\(x= 660-239\)
\(x= 421\)
