I think the answer is 16
HOPE THIS HELPS!!!!!!! ;-)
Answer:
2
Step-by-step explanation:
calculator


10x−28=3x+56
10x=3x+56+28
10x=3x+84
10x−3x=84
7x=84

x=12
Hope this helps, have a blessed and wonderful day!
Answer:
B. (-2,3)
Step-by-step explanation:
-3x+5y = 21
x=2y-8
Substitution
-3(2y-8)+5y =21
-6y+24+5y=21
-y+24=21
-y=-3
y=3
Plug-in other equation
2*3-8=x
6-8=x
x=-2