1a,
(x/2)*3+x*4=231
=>(3/2+4)x=231
=>(11/2)x=231
=>x=231/(11/2)
=>x=231(*2/11)
=>x=42
Vậy x=42
&&&&
1a,
(x/2)*3+x*4=231
=>(3/2+4)x=231
=>(11/2)x=231
=>x=231/(11/2)
=>x=231(*2/11)
=>x=42
Vậy x=42
^HT^
^^^^^^
1a,
(x/2)*3+x*4=231
=>(3/2+4)x=231
=>(11/2)x=231
=>x=231/(11/2)
=>x=231(*2/11)
=>x=42
^HT^
^HT^
1b,
x*(1/4)+x*(1/5)+x*2=19,6
=>(1/4+1/5+2)x=19,6
=>(49/20)x=19,6
=>x=19,6/(49/20)
=>x=19,6*(20/49)
=>x=8
vậy x=8
^H^
1a,
(x/2)*3+x*4=231
=>(3/2+4)x=231
=>(11/2)x=231
=>x=231/(11/2)
=>x=231(*2/11)
=>x=42
Vậy x=42
^HT^