Answer:
x=3.6, y=-2.5
Explanation:
we have:
5x+4y=8
10x-4y=46
add across to get rid of y (5x+10x=15x, 4y+(-4)=0y, 8+46=54:
15x=54
dividing both sides by 15
x=3.6
input x=3.6 into any of the first two equations, I'll use the first:
5x+4y=8
5(3.6)+4y=8
18+4y=8
subtract 18 on both sides
4y=-10
y=-10/4=-2.5
y=-2.5