Solve for both systems 2x + 4y = 42 and x + 4y = 41

x + 4y = 41

x + 4y-4y = 41-4y

x= 41-4y

2x + 4y = 42

2(41-4y) + 4y = 42

2(41) (2)(-4y) + 4y = 42

82-8y+4y=42

82-4y=42

82-4y-82=42-82

-4y=-40

-4y/-4=-40/-4

y=10

x= 41-4y

x= 41-4(10)

x= 41-40=1