What is the x coordinate of the solution to the following system of equations
x-y=-3
x+3y=5
a x=-2
b x=-1
c x=1
d x=2

When i add money am i supposed to make it like this 7+12 or 7.00+12.00 because i got 19 dollars for my answer

Lee has $1.75 in dimes and nickels. the number of nickels is 11 more than the number of dimes. how many of each coin does he have?

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way