(536+x)-420=116
536 + x – 420 = 116
x = 116 + 420 – 536
x = 0
437 - (227 + x) = 0
437 – 227 – x = 0
– x = 0 + 227 – 437
-x = -210
x = 210
468 - 217 - x = 51
– x = 51 + 217 – 468
-x = -200
x = 200
(536+x)-420=116
536 + x – 420 = 116
x = 116 + 420 – 536
x = 0
437 - (227 + x) = 0
437 – 227 – x = 0
– x = 0 + 227 – 437
-x = -210
x = 210
468 - 217 - x = 51
– x = 51 + 217 – 468
-x = -200
x = 200