Question

142+[514 - x]:7 =243

Answer 1

142 + ( 514 - x) = 243 x 7

142 + ( 514 - x ) = 1701 

514 - x = 1559 

x = -1045

Answer 2

( 514 - x) : 7 = 243 - 142 

( 514 - x) : 7 = 101 

514 - x = 707 

x = -193

Answer 3

142+(514-x)=1701

514-x=1559

       x=1559-514

       x=1045