матем 50-(40-х)×3+2=10

50 - ( 40 - x ) • 3 + 2 = 10
50 - ( 40 - x ) • 3 = 8
( 40 - x ) • 3 = 42
40 - x = 42 : 3
- x = 14 - 40
X = 26

50-120+3x+2=10
3x=78
x=26