Question

Choose the correct answer from the given four options $(3to15)$:

7. $x=3$ is the solution of the equation.

• A. $x+7=4$
• B. $x+10=7$
• C. $x+7=10$
• D. $x+3=7$

Answer 1

The correct option is C

$x+7=10$

Explanation:

Given, $x=3$. So, putting value of $x$ in all options.

A. Equation is $x+7=10$.

Putting $x=3$, we get LHS$$\begin{gathered} =3+7 \\ =10 \end{gathered}$$

Now, LHS$\ne$RHS. So,$x=3$ is not a solution for $x+7=10$.

B. Equation is $x+10=7$.

Putting $x=3$, we get LHS$$\begin{gathered} =3+10 \\ =13 \end{gathered}$$

Now, LHS$\ne$RHS. So,$x=3$ is not a solution for $x+10=7$.

C. Equation is $x+7=10$

Putting $x=3$, we get LHS$$\begin{gathered} =3+7 \\ =10 \end{gathered}$$

Now, LHS$=$RHS. So,$x=3$ is a solution for $x+7=10$.

D. Equation is $x+3=7$.

Putting $x=3$, we get LHS$$\begin{gathered} =3+3 \\ =6 \end{gathered}$$

Now, LHS$\ne$RHS. So,$x=3$ is not a solution for $x+3=7$.

So, option C is correct.