Answer:
first one is correct................
Answer:
Do you mean which equation should the 5x+10=15 be multiplied to?
it would be -2
Step-by-step explanation:
This is because 5 times -2 is -10
and so when you add the (now) x value of the first equation to the x value of the second equation, it gets 0
which makes it eliminated!
-10x+10x=0
Answer:
3142
Step-by-step explanation:
4713 x 2/3
You had 12 the next day and the day after that you had 18