Answer:
10
Step-by-step explanation:
Answer:
The 2 equations are E = 2K and K = E-3
Step-by-step explanation:
Let the height of Eric be E
Let the height of Kevin be K
Eric is twice as tall as his little brother Kevin
E = 2K
Kevin is also three feet shorter than Eric
K = E-3
The 2 equations are E = 2K and K = E-3
2x-4y=56
-4/-4 56/-4
=2x-y=-14
2/2 -14/2
X-y= -7
We know the value absolute of x is possible x if x positive or -x if x negative.
So we have two cases:
* 5x+4=14 or 5x=14-4, and 5x=10, x=10:5 and we obtain x=2
* 5x+4=-14 or 5x=-14-4, and 5x=-18, so we have x= -18:5
So we choose c, 2, -18/5
