Answer:

1) 2,(2) 3

Step-by-step explanation:

1) 2x+3/3x+4=7/10

10(2x+3)=7(3x+4)

20x+30=21x+28

20x-21x=28-30

-x=-2

x=2

2) 5x-1/4-2=5x-3/8

5x-1-8/4=5x-3/8

5x-9/4=5x-3/8

5x-9=(5x-3)×4/8

5x-9=20x-12/8

5x=20x-12/8+9

5x=20x-12+72/8

5x=20x+60/8

(5x)8=20x+60

40x-20x=60

20x=60

x=3