17х-8х+52=281515*(2х+11)=2857*(123-4х)=794

Question

17х-8х+52=2815

15*(2х+11)=285

7*(123-4х)=794

Answer 1

17х-8х+52=2815
9х=2815-52
9х=2763
х=2763:9
х=307

15(2х+11)=285
30х+165=285
30х=285-165
30х=120
х=120:30
х=4