Question

Which value of x satisfies both 3x + y = 9 and 3x − 5y = 15?

103

23

−1

0

Answer 1

subtract the equations

Answer 2

thanks

Answer 3

\[ 3x + y = 9 \]
\[ -( 3x − 5y = 15)\]
We want opposite signs so that the terms will cancel out :)
\[3x + y = 9 \]
\[ - 3x + 5y = -15)\]

Answer 4

Everything cancels out so what would x=?