(7x+4/3)-(11/2)=[9+6]/2

Q1:(7x+4/3)-(11/2)=[9+6]/2
Multiply each by 6, we got
[(7x) * 6 + (4/3) * 6] - [(11/2) * 6] = [9 + 6] / 2 * 6
42x + 8 - 33 = 45
42x - 25 = 45
42x = 45 + 25 = 70
x = 70 / 42
x = 1 2/3 (ans.)

(7x+4/3)-(11/2)=[9+6]/2
(84x+16/12)-(66/12)=90/12
84x+16-66=90
84x-50=90
84x=140
x=1 56/84
x=1 2/3

同上面個個唔同計法