10*2+x=36 2*x=10+36 x*10=36 x+356=2400: 6 d: 15=706=1002

1) x=16
2) x=23
3) x=3,6
4) x=44

10×2+x=36
20+x=36
x=36-20
x=16
10×2+16=36
36=36
2×x=10+36
2×x=46
x=46:2
x=23
2×23=10+36
46=46
x×12=36
x=36:12
x=3
3×12=36
36=36
x+356=2.400:6
x+356=400
x=400-356
x=44
44+356=2.400:6
400=400