Solve for p
p=\frac{3}{10}=0.3
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2\times 5p+9=12
Multiply both sides of the equation by 4, the least common multiple of 2,4.
10p+9=12
Multiply 2 and 5 to get 10.
10p=12-9
Subtract 9 from both sides.
10p=3
Subtract 9 from 12 to get 3.
p=\frac{3}{10}
Divide both sides by 10.
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