2X - 2.8x 2.5 = 8.96 8X + 2X = 31.4 2x (X + 1) = 6 7.8x 2.4 X = 1.08

2X - 2.8x 2.5 = 8.96 8X + 2X = 31.4 2x (X + 1) = 6 7.8x 2.4 X = 1.08

2X - 2.8x 2.5 = 8.96
2x = 8.96 + 7 = 15.96
x = 7.98
8X + 2X = 31.4
10x = 31.4
x = 3.14
2x (X + 1) = 6
x ^ 2 + x - 3 = 0
x = (- 1 + 체크 13) / 2 또는 (- 1 - 체크 13) / 2
7.8x 2.4 X = 1.08
15.6x = 0.9
x = 9 / 156
x = 3 / 32