124 + ( 118 - x ) = 217
118 - x = 217 - 124
118 - x = 93
x = 118 - 93
x = 25
156 - ( x + 61 ) = 82
x + 61 = 156 - 82
x + 61 = 74
x = 74 - 61
x = 13
124 + (118 -x ) = 217 156 - ( x+61) = 82
(118-x) = 217 -124 ( x +61)= 156 - 82
(118 -x)= 93 ( x +61) = 74
x = 118 - 93 x = 74 - 61
x = 25 x = 13
124 + ( 118 - x ) = 217
124 + 118 - x = 217
- x = 217 - 124 - 118
- x = - 25
x = 25
156 - ( x + 61 ) = 82
156 - x - 61 = 82
- x = 82 + 61 - 156
- x = - 13
x = 13