Question

solve for x:
\sqrt{x} + 4 = 7

a. x = 3
b. x = 9
c. x = 11
d. x = 121

Explanation:

Step1: Isolate the square root term

Subtract 4 from both sides of the equation $\sqrt{x} + 4 = 7$. So we have $\sqrt{x}=7 - 4$.
$\sqrt{x}=3$

Step2: Eliminate the square root

Square both sides of the equation $\sqrt{x}=3$ to solve for $x$. So $(\sqrt{x})^2 = 3^2$.
$x = 9$

Answer:

B. $x = 9$