9x = 1000 - 9109x = 90x = 10
100 * x = 2430 - 20301000 = 400x = 4
100 / x = 2430 - 240100 / 4 = 2430 - 24025 = 2190
9x = 1000 - 910
9x = 90
x = 10
100 * x = 2430 - 2030
1000 = 400
x = 4
100 / x = 2430 - 240
100 / 4 = 2430 - 240
25 = 2190