(х-43)*31=403
(у-3):5=75
48:t+7=15
14-81:x=5

(х-43)*31=403х-43=403:31х-43=13х=13+43х=56(у-3):5=75у-3=75*5у-3=375у=375+3у=37848:т+7=1548:т=15-748:т=8т=48:8т=614-81:х=581:х=14-581:х=9х=81:9х=9