Y=3x² + 7x - 10

y - 19x = 22

Step-by-step explanation:

Step1: Solvex+y=7for x:

x+y=7

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

x=-y+7

Step2: 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

Step3: Substitute4foryinx=-y+7:

x=-y+7

x=-4+7

x=3 (Simplify both sides of the equation)

x=3 and y=4