Question

Solve the following system equation, showing your work in the space

provided.
y = 5x + 3
-2x-4y= 10

Answer 1

Explanation:

the first equation is already (without any transformation) expressing y in terms of x.

we can use that identity in the second equation :

-2x - 4(5x + 3) = 10

-2x - 20x - 12 = 10

-22x = 22

x = -22/22 = -1

and then we use the first equation to solve for y :

y = 5×-1 + 3 = -5 + 3 = -2

so,

x = -1

y = -2