2,4х+8,3+6,2х+1,7+5,4х=66,7
14х+10=66,7
14х=56,7
х=56,7:14
х=4,05
2.4*4,05+8,3+6,2*4,05+1,7+5,4*4,05=66,7
9,72+8,3+25,11+1,7+21,87=66,7
66,7=66,7
124,2:(98-(8х+76,52))=23
124,2:(98-8х-76,52)=23
124,2:(21,48-8х)=23
21,48-8х=124,2:23
21,48-8х=5,4
8х=21,48-5,4
8х=16,08
х=16,08:8
х=2,01
124,2:(98-(8*2,01+76,52))=23
124,2:(98-92,6)=23
124,2:5,4=23
23=23