Question

5-7x=2x-13(3x+16)/2=4x-7(5y-11)/7=(11y+3)/2127%x-17%=20%x+1/

Answer 1

5-7x=2x-13

2x+7x=5+13

9x=18

x=2

(3x+16)/2=4x-7

3x+16=2(4x-7)

3x+16=8x-14

8x-3x=16+14

5x=30

x=6

(5y-11)/7=(11y+3)/21

21[(5y-11)/7]=21[(11y+3)/21]

3(5y-11)= 11y+3

15y-33=11y+3

33+3=15y-11y

4y=36

y=9

27%x-17%=20%x+1/4

100（27%x-17%）=100（20%x+1/4）

27x-17=20x+25

27x-20x=17+25

7x=42

x=6