Question 1118799
width x
length x+5
P(x) perimeter


{{{P(x)=2(x+5)+2x}}}
{{{P(x)=2x+10+2x}}}
{{{highlight(P(x)=4x+10)}}}


If P is given and x is unknown, then solve for x.
{{{4x+10=P}}}
{{{4x=P-10}}}
{{{x=(P-10)/4}}}
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{{{If}}}{{{given}}}{{{P=38}}},
{{{x=(38-10)/4}}}
{{{x=7}}}{{{and}}}{{{x+5=12}}}