The mistake is in step 3:
I: −2m =−12 − 2n
II: 2m = 8 + 8n
the student set both right sides of the equations equal (−12 − 2n = 8 + 8n), but the left sides aren't equal: first equation has -2m, second has +2m so the signs of one of the equations must be inverted first
x^2 - 49 = 0
Add 49 to both sides:
x^2 = 49
Take the square root of both sides:
X = 7
Answer:
uh maybe 16x= -3 or x= -3/16
Step-by-step explanation:
I'm so sorry if this is wrong or not what you're looking for
(2,4) is the only possible answer because it is the only one in the shaded area