6.5:3.25=x÷4
6.5:3.25=x:4
3.25x=6.5×4
3.25x=26
x=26÷3.25
x=8
0.075+x/2=30℅
x/2=30℅-0.075
x/2=0.3-0.075
x/2=0.225
x=2×0.225
x=0.45
6.5:3.25=x÷4
6.5:3.25=x:4
3.25x=6.5×4
3.25x=26
x=26÷3.25
x=8
0.075+x/2=30℅
x/2=30℅-0.075
x/2=0.3-0.075
x/2=0.225
x=2×0.225
x=0.45