2x+8y=74

3x - 4y = 43

y=17/7

x=123/7

Explanation:

2x=74-8y

x = (74-8y) / 2

x=2 (37-8y) / 2

x=37-8y

3 (37-8y) - 4y=43

111-24y-4y=43

111-43=24y+4y

68=28y

y=68/28

y=17/7

x=37-8 (17/7)

x=37-136/7 = (37*7-136) / 7 = (259-136) / 7

x=123/7

(2x+8y) / 2=74/2

x+4y=37

x=37-4y

3 (37-4y) - 4y=43

117 - 12y - 4y = 43

-16y = 74

y=4.625

x=37 - 4 (4.625)

x = 37 - 18.5

x = 55.5

so y=4.625，x=55.5