[방정식 풀이] (1) 1 / 2x = 3 / 4 (2) 2 / 3 x + x = 15

[방정식 풀이] (1) 1 / 2x = 3 / 4 (2) 2 / 3 x + x = 15

1 / 2x = 3 / 4
x = 3 / 2
2 / 3 x + x = 15
5 / 3x = 15
x = 9