The answer is
3 + (2) (4) - 4
answer is 7
This should be your answer
I'll solve it algebraically
x+y=4
x-3y=12
multiply first equatoin by -1 and add to second
-x-y=-4
<u>x-3y=12 +</u>
0x-4y=8
-4y=8
divide both sides by -4
y=-2
sub back
x+y=4
x+-2=4
add 2 to both sides
x=6
x=6
y=-2
(6,-2)
two years at 3% = .03*2 = .06
so
.06 times original deposit = 72
so 72/.06
which is
1200