Solving for x in Proportions

Analyze the ratios and solve for the unknown!

1) Solve
x/10 = 1/2
2) Solve
x/8 = 5/4
3) Solve
x/40 = 2/8
4) Solve
x/12 = 1/3
5) Solve
4/7 = x/28
6) Solve
2/3 = x/12
7) Solve
1/7 = x/35
8) Solve
x/15 = 2/3
9) Solve
3/4 = x/12
10) Solve
x/15 = 5/5
11) Solve
x/10 = 6/2
12) Solve
1/5 = x/15
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