5*(x-2)=4*(x+3) 2x+（50-x）*4=140 3x-(8-x)=20*4 200x=(x-0.5)*240 12x+34=14*(x-4)

5*(x-2)=4*(x+3) 5x-10=4x+125x-4x=12+10x=222x+（50-x）*4=140 2x+200-4x=1404x-2x=200-1402x=60x=60÷2x=303x-(8-x)=20*4 3x-8+x=803x+x=80+84x=88x=88÷4x=22200x=(x-0.5)*240 200x=240x-0.5*240240x-200x=12040x...3*（x+2)=4*（x+1) 81x-342=76（x-2)你也太过分了吧？重新问