2×3(3x+1)-143 ala e 3x nu ie ori si punctul ala e ori

2 × 3 ( 3 x + 1 ) - 1 = 43
6 ( 3 x + 1 ) - 1 = 43
6 ( 3 x + 1 ) = 43 + 1
6 ( 3 x + 1 ) = 44
3 x + 1 = 44 : 6
3 x + 1 = 7, ( 3 )
3 x = 7, ( 3 ) - 1
3 x = 6, ( 3 )
x = 6, ( 3 ) : 3
x = 2, ( 1 )
Răspuns:
2*3(3x + 1) - 1 = 43
6*(3x + 1) = 44
18x + 6 = 44
18x = 38
x = 38/18 = 19/9