Question

87:(4x+5)=3 17*(3x-16)=85

Answer 1

87:(4х+5)=3
4х+5=87:3
4х+5=29
4х=29-5
4х=24
х=24:4
х=6

17*(3х-16)=85
3х-16=85:17
3х-16=5
3х=5+16
3х=21
х=21:3
х=7