Question

is (6, 15) a solution to this system of equations?
x = 6
y = 2x + 3
yes
no

Explanation:

Step1: Check the first - equation

The first equation is $x = 6$. In the point $(6,15)$, $x = 6$, so it satisfies the first equation.

Step2: Check the second - equation

Substitute $x = 6$ into the second equation $y=2x + 3$. Then $y=2\times6+3=12 + 3=15$. In the point $(6,15)$, $y = 15$, so it satisfies the second equation.

Answer:

yes