1)x+7/4=25/6
12x+21=50
12x=50-21
12x=29
x=29/12
2)x-5/6=13/8
18x-15=26
18x=26+15
18x=41
x=41/18
3)x+2x=15/2
3x=15/2
6x=15
x=15/6
4)x+3x=32/5
4x=32/5
20x=32
x=32/20=8/5
5)x+3/2=2 2/5
x+3/2=12/3
x+3/2=4
2x+3=8
2x=8-3
2x=5
x=5/2
6)3x-2 1/16=3/8
3x-33/16=3/8
48x-33=6
48x=6+33
48x=39
x=39/48
7)5+2,5=7,5
x/4=7,5
x=7,5*4
x=30