solving systems of equations:
solve 5x-6y=-38
3x+4y=0
a.) (4,3)
b.) (-4,3)
c.) (4,-3)
d.) (-4,-3)
i tried using substitution, but that didn't work. i tried elimination but i know i'm doing it wrong . i keep getting fractions. if someone could go step by step on how to do it, that'd be great.

this is the formula: v = the value of investment at the end of the time period

p = the principal amount (the initial amount invested)

r = the annual interest rate

n = the annual frequency of compounding (how many times a year interest is added)

t = the number of years the money is invested

^ means raise to the power of