Replace x in each equation and see which ones are true.
The answers are:
C. If 5x + 10 =20 then x =2
D. If 6x-12=48, then x=10
F. If 8x(x-4)=32, then x=8
Answer:
4.5 I hope I was not to late
The first relation is a function, the others no
That is true. it is part of natural numbers.
