64+36:(х·3-15)=70
64(3х-15)+36=70(3x-15)
70(3х-15)-64(3х-15)= 36
6(3х-15) = 36
3х-15=6
3х = 21
х = 7
36:(3х-15)=70-64
36:(3х-15)=6
3х-15=36:6
3х=6+15
3х=21
х=21:3
х=7
64+36:(х·3-15)=70
64(3х-15)+36=70(3x-15)
70(3х-15)-64(3х-15)= 36
6(3х-15) = 36
3х-15=6
3х = 21
х = 7
36:(3х-15)=70-64
36:(3х-15)=6
3х-15=36:6
3х-15=6
3х=6+15
3х=21
х=21:3
х=7