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Write and solve an equation based off the verbal phrase. The sum of x and 9 is divided by 2. That quantity is equal to 3x.

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Start with the sum of x and 9, giving the expression

x + 9
This is divided by 2 so

(x + 9)/(2)
This equals 3x so the equation is

(x + 9)/(2) = 3x
This can the be solved.
Multiply both sides by 2 to get

x + 9 = 6x
Then take x from both sides

9 = 5x
Divide by 5 to get the value for x

1.8 = x

User Rcanpahali
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