Question

Find the value of athat makes the ordered pair a solution of the equation.

$y=2x+5;\left(-1,a\right)$

Short answer

The value $a=3$ would make the ordered pair $\left(-1,a\right)$ a solution of the given equation.

Step-by-step solution

Step 1. Given Information.

An equation: $y=2x+5$ and the point: $\left(-1,a\right)$

Step 2. Calculation.

To find the value of a, we will substitute coordinates of given point in our given equation and solve for a as:

$\begin{array}{c}y=2x+5(\text{Givenequation)}\\ a=2(-1)+5\left(\text{Substituting}x=-1\text{and}y=a\right)\\ a=-2+5\\ a=3\end{array}$

Therefore, the value of a would be 3.

Step 3. Conclusion.

The value of a would be 3.