1237-(235-(10x+9x+23))=809 решить дам 30 баллов!!!!!!

Question

1237-(235-(10x+9x+23))=809
решить дам 30 баллов!!!!!!

Answer 1

1237-(235-(10х+9х+23))=809
1237-(235-10х-9х-23)=809
1237-235+10х+9х+23=809
10х+9х=809-1237+235-23
18х= -216
Х= - 216:18
Х= - 12