Question

解方程1/2(x-1)=2-1/5(x+2)

Answer 1

1/2（x-1）=1/5(x+2)

5(x-1)=2(x+2)

5x-5=2x+4

3x=9

x=3

6-3y/0.3+2-6y/0.4=1-3y-4/0.5

20-10y+5-15y=-6y-6

-19y=-31

y=31/19

x+2/2=x-1/3 - 2

3x+6=2x-2-12

x=-20