Solve the following system:
{y = 6 x - 24
{x = 9 x
In the second equation, look to solve for x:
{y = 6 x - 24
{x = 9 x
Subtract 9 x from both sides:
{y = 6 x - 24
{-8 x = 0
Divide both sides by -8:
{y = 6 x - 24
{x = 0
Substitute x = 0 into the first equation:
{y = -24
{x = 0
Collect results in alphabetical order:
Answer: {x = 0
{y = -24
y = -x + 3
for x = -3 → y = -(-3) + 3 = 3 + 3 = 6
for x = 0 → y = -0 + 3 = 0 + 3 = 3
for x = 3 → y = -3 + 3 = 0
Answer:
9
Step-by-step explanation:
x² − 36 = 5x
x² − 5x − 36 = 0
(x − 9) (x + 4) = 0
x = 9 or -4