Question
Solve: 2x + 20% of x = 12.1
✓
Answer
$\begin{aligned} & 2 x+20 \% \text { of } x=12.1 \\ & \Rightarrow 2 x+\frac{x \times(20)}{100}=12.1 \\ & \Rightarrow 2 x+\frac{20 x}{100}=12.1 \\ & \Rightarrow 2 x+\frac{2 x}{10}=12.1 \\ & \frac{20 x+2 x=121}{10} \\ & \Rightarrow 22 x=121 \\ & \Rightarrow x=\frac{121}{22}=\frac{11}{2} \\ & \therefore x=\frac{11}{2} \text { or } 5 \frac{1}{2}\end{aligned}$
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