x + 123 = 985
x = 985 - 123
x = 862
x - 124 = 857
x = 857 + 124
x = 981
x+123=985 =>x=985-123 =>x=862
x-124=857 =>x=857+124 =>x=981
x + 123 = 985
x = 985 - 123
x = 862
x - 124 = 857
x = 857 + 124
x = 981
x + 123 = 985
x = 985 -123
x = 862
x - 124 = 857
x = 857 + 124
x = 981
x + 123 = 985
x = 985 - 123
x = 862
x - 124 = 857
x = 857 + 124
x = 981
x + 123 = 985 x - 124 = 857
x = 985 - 123 x = 857 + 124
x = 862 x = 981