Sebastián tried to solve the system of equations below. He says there are infinitely many solutions. Do you agree? Explain.
x-2y = 1
x = 2y + 1
x-2y = 1
4x - 4y = 11
(2y + 1) – 2y = 1
2y + 1 - 2y = 1
1=1
I ___ with Sebastian, my reasoning is because ___

I disagree

Step-by-step explanation:

first three equations are identical

a) x - 2y = 1

b) 4x - 4y = 11 is unique

last three are not equations. They are statements that say 1 = 1 and are true, but not relevant.

a) x - 2y = 1

x = 2y + 1

b) 4x - 4y = 11

b) 4(2y + 1) - 4y = 11

      8y + 4 - 4y = 11

                    4y = 7

                      y = 7/4

x = 2(7/4) + 1 = 9/2

the point (4.5, 1.75) is a solution to the relevant system equations.

answer: 12

step-by-step explanation: