I believe the answer should be 6x+3
Answer:
well the money doubles every 6 years but its only been 4 so
7,400 x 4 = 29,600
$29,600 is the answer
Add y to both sides in 1st equation
-2x=y
sub -2x for y in2nd equation
3x-(-2x)=10
3x+2x=10
5x=10
divide 5
x=2
sub back
-2x=y
-2(2)=y
-4=y
(x,y)
(2,-4)
C is ans