7x + 2y = 24

8x + 2y = 30

(8x + 2y) - (7x + 2y) = 30 - 24

X = 6

Answer:x=3 and y=4

Step-by-step explanation:

Let's solve your system by substitution.

x+y=7; x+2y=11

Step: Solvex+y=7for x:

x+y=7

x+y+-y=7+-y (Add - y to both sides)

x=-y+7

Step: Substitute-y+7forxinx+2y=11:

x+2y=11

-y+7+2y=11

y+7=11 (Simplify both sides of the equation)

y+7+-7=11+-7 (Add - 7 to both sides)

y=4

Step: Substitute4foryinx=-y+7:

x=-y+7

x=-4+7

x=3 (Simplify both sides of the equation)