2.3x=9, so x=3.

3.0.5x=24.5 x=24.5 times 2=49.

4 8x=400+32 times 5 = 560, so x=560/8=70.

5 is also multiplied by 36,20+27x = 33, and x = 13/27.

6.7x=3/4+ 1/8=7/8，x= 1/8

7. Multiply 6 at the same time, and x = 63.

8.7/ 12 times x=4/5 times 5/8= 1/2, x=6/7.