Answer:
x=4
Step-by-step explanation:
x+3=7
First, subtract 3 from both sides
7-3=4
So x=4
CHECK:
Substitute x with 4
4+3=7
7-3=x
Answer:14*8=112
The area is 112
$21
21+42=63
x=63:3
x=$21
f(2)=21
f(2)=2^3+2*2-4+13=8+4-4+13=8+13=21
