12x+13x=25
=>(12+13)x=25
=>25x=25
=>x=25:25
=>x=1
\(12.x+13.x=25\)
\(x.\left(12+13\right)=25\)
\(x.25=25\)
\(x=25:25\)
\(x=1\)
12x + 13x = 25
x(12 + 13) = 25
x25 = 25
x = 25 : 25
x = 1
kết bạn nha
12x+13x=25
=>(12+13)x=25
=>25x=25
=>x=25:25
=>x=1
X.[12+13]=25
x.25 =25
x =25:25
x =1