Answer
(-3,-9)
Work Step by Step
$7x+8y+93=0$
$y=3x$
Substitute 3x for y in the first equation.
$7x+8(3x)+93=0\longrightarrow$ simplify
$7x+24x+93=0\longrightarrow$ simplify
$31x+93=0\longrightarrow$ subtract 93 from both sides
$31x+93-93=0-93\longrightarrow$ simplify
$31x=-93\longrightarrow$ divide both sides by 31
$31x\div31=-93\div31\longrightarrow$ simplify
$x=-3$
Substitute -3 for x in the second equation.
$y=3(-3)\longrightarrow$ simplify
$y=-9$
