12x- 35+7x=98 25(x+1)-16=59 13(x+6)-72=123 77+8 (x-5)=125

Question

12x- 35+7x=98 25(x+1)-16=59 13(x+6)-72=123 77+8 (x-5)=125

Answer 1

1)19х-35=98
19х=98+35
19х=143
х=143:19
х≈7

4)77+8(х-5)=125
77+8х-40=125
8х+37=125
8х=125-37
8х=88
х=11