Solve 3x-5y=13 4x+8y=-9

multiply the first equation by 4 and the second by - 3, we get

12x - 20y = 52

-12x - 24y = 27

Add these 2 equations to eliminate x:-

-44y = 79

y = 79 / - 44 = - 1.795

Substitute for y in the original equation:-

3x - 5 (-1.795) = 13

3x = 4.025

x = 1.342

Solution is (-1.80, 1.34) to nearest hundredth