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
Answer: I'm pretty sure I can help, just give me like 3 minutes..
-Angie
Step-by-step explanation:
in the textbook column you can find the search symbol
there you can search for the hook you want
hope this is what you wanted
2 times a number minus 9 is less than or equal to 21. and in inequality form that’s: 2x - 9 >_ 21 and u make a number line and a closed circle on 15 and an arrow going right. i hope i understood your question right
6, because 3/4=6/8 so 6 kids ate it if each has 1/8
