х:7-38=22, 45:(х-63)=9, 56:(31-х)=4, 4(х-16)+10=54

1) х:7=22+38=60,х=60*7=4202) 9(х-63)=45, 9х=45+63*9=612, х=683) 4(31-х)=56, 124-4х=56, 4х=124-56=68, х=68/4=174) 4х-64+10=54, 4х=54-10+64=108, х=27