(2х+58):42=86 (27х+11)*315=11970 6528:(3а-39)=64 3х+5х+96=568

(2х+58):42=86(2х+58)=86*422х+58=36122х=3612-582х=3554х=3554:2х=1777(27х+11)*315=11970(27х+11)=11970:31527х+11=3827х=38-1127х=27х=16528:(3a-39)=64(3a-39)=6528:643a-39=1023a=102+393a=141a=141:3a=473х+5х+96=5688х=568-968х=472х=472:8х=59