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Solve for \( r \). \[ 12-\frac{1}{5} r=2 r+1 \]

Ask by Gonzalez Carroll. in the United States
Feb 27,2025

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Answer

\( r=5 \)

Solution

Solve the equation \( 12-\frac{1}{5}r=2r+1 \). Solve the equation by following steps: - step0: Solve for \(r\): \(12-\frac{1}{5}r=2r+1\) - step1: Multiply both sides of the equation by LCM: \(\left(12-\frac{1}{5}r\right)\times 5=\left(2r+1\right)\times 5\) - step2: Calculate: \(60-r=\left(2r+1\right)\times 5\) - step3: Calculate: \(60-r=10r+5\) - step4: Move the expression to the left side: \(-r-10r=5-60\) - step5: Add and subtract: \(-11r=5-60\) - step6: Add and subtract: \(-11r=-55\) - step7: Change the signs: \(11r=55\) - step8: Divide both sides: \(\frac{11r}{11}=\frac{55}{11}\) - step9: Divide the numbers: \(r=5\) The solution to the equation \(12-\frac{1}{5}r=2r+1\) is \(r=5\).

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To solve for \( r \) in the equation \[ 12 - \frac{1}{5} r = 2r + 1, \] first, we can isolate the variable \( r \). Start by moving all \( r \) terms to one side and constant terms to the other. We'll add \( \frac{1}{5} r \) and subtract 1 from both sides: \[ 12 - 1 = 2r + \frac{1}{5} r. \] This simplifies to: \[ 11 = 2r + \frac{1}{5} r. \] Next, we need to combine the \( r \) terms on the right. To do that, we can express \( 2r \) in terms of a fraction with a common denominator: \[ 2r = \frac{10}{5} r, \] so we have: \[ 11 = \frac{10}{5} r + \frac{1}{5} r = \frac{11}{5} r. \] Now, to solve for \( r \), multiply both sides by 5 to eliminate the fraction: \[ 5 \times 11 = 11r, \] which gives: \[ 55 = 11r. \] Now divide by 11: \[ r = 5. \] Thus, the solution is \[ \boxed{5}. \]

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