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Help!!! I am stuck on how to find the variables..

Help!!! I am stuck on how to find the variables..-example-1

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\begin{gathered} C=x+12 \\ Then \\ (x+12)+(2x+9)+(3x-1)=180 \\ 6x+20=180 \\ 6x=180-20 \\ 6x=160 \\ x=(160)/(6) \\ x=26.7 \\ C=26.7+12 \\ C=38.7 \\ \text{The value of C is 38.7} \end{gathered}

User Pavel Bredelev
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