12x+34=18x-14
12x-18x=-14-34
-6x=-48
х=-48/-6
х=8
48-31x=11+54
-31x=11+54-48
-31x=17
x=17/-31
х=-0,54838709677
12x+34=18x-14
12x-18x=-14-34
-6x=-48
х=-48/-6
х=8
48-31x=11+54
-31x=11+54-48
-31x=17
x=17/-31
х=-0,54838709677