The formula for the area of a triangle is:
[tex]Area=\frac{1}{2}(base\times height)[/tex]
The height of this triangle is 7in, the area is equal to 84 squared inches, and the base is represented as x. Substitute those values on the formula:
[tex]84=\frac{1}{2}(7x)[/tex]
Multiply both sides by 2 and divide by 7 to isolate x:
[tex]\begin{gathered} x=\frac{2}{7}\times84 \\ =\frac{168}{7} \\ =24 \end{gathered}[/tex]
Therefore, the value of x is 24 in.
