Question 1164726
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The problem can be solved mentally in a few seconds....<br>
Assuming the problem is for practice using formal algebra....<br>
x = width
x+3 = length (3 more than the width)<br>
Area = length times width = 10:<br>
{{{x(x+3) = 10}}}
{{{x^2+3x = 10}}}<br>
This is a quadratic equation.  Get everything on one side of the equation (".... = 0") and solve by factoring.  You will get two answers, only one of which makes sense.<br>