tell whether x=-2, y=9 is a solution to the two v ariable equation y-3x=15

1 answer

To determine if \( x = -2 \) and \( y = 9 \) is a solution to the equation \( y - 3x = 15 \), we can substitute the values of \( x \) and \( y \) into the equation.

Given the equation:

\[ y - 3x = 15 \]

Substituting \( x = -2 \) and \( y = 9 \):

\[ 9 - 3(-2) = 15 \]

Now, calculate the left side:

\[ 9 + 6 = 15 \]

Since both sides of the equation are equal:

\[ 15 = 15 \]

Thus, \( x = -2 \) and \( y = 9 \) is indeed a solution to the equation \( y - 3x = 15 \).