Question

checking solutions to a system of equations
1.
$\

$$\begin{cases} y = 2x + 1 \\\\ y = x + 4 \\end{cases}$$

$
point: $(3, 7)$ yes / no

Explanation:

Step1: Substitute into first equation

Substitute $x=3, y=7$ into $y=2x+1$:
$7 = 2(3) + 1$
$7 = 6 + 1$
$7 = 7$ (True)

Step2: Substitute into second equation

Substitute $x=3, y=7$ into $y=x+4$:
$7 = 3 + 4$
$7 = 7$ (True)

Answer:

YES