1) x - 124 = 900 - 216
x = 900 - 216 + 124
x = 684
2)x - 124 = 684
x = 684 + 124
x= 808
3)x = 684 + 124
x = 808
4) x = 808
808 = 808
1) x - 124 = 900 - 216
x = 900 - 216 + 124
x = 684
2)x - 124 = 684
x = 684 + 124
x= 808
3)x = 684 + 124
x = 808
4) x = 808
808 = 808