Thread: Construction and Solving of Equations

1. Construction and Solving of Equations

This is the sum, I worked it out but got stuck -

Write down a relevant equation involving the variables defined and solve -

The Perimeter of aa Square is $(2x+7) cm$. Its Area is $49 cm^2$

I worked out an equation and I do get an answer but the answer is negative. The book says the answer should be 10.5 I get -10.5

Here is the Equation:

$(\frac{2x+7}{4})^2=49$

What am I doing wrong?

2. $\left(\frac{2x+7}{4}\right)^2 = 49$

$\frac{2x+7}{4} = 7$

$2x+7 = 28$

$2x = 21$

$x = 10.5$