2 ways:
1. solve for x
2. simplify the 10 so it can add to the 4/x
if you use 1. solve for x
8/x=4/x+10
subtract 4/x from both sides
4/x=10
multiply both sides by x
4=10x
divide both side sby 10
0.4=x
proportion is 8/0.4=4/0.4+10
if you use 2. make 10 addable to 4/x
4/x+10/1
multiply 10/1 by x/x
4/x+10x/x=(4+10x)/x
8/x=(4+10x)/x
multiply both sides by x to clear fraciton
8=4+10x
subtract 4
4=10x
divide 10
0.4=x
