Question

Solve the following system of equations by the substitution method.

x - y = 0

x - y - 2 = 0

What is the solution set?


{(1, -1)}
{(-1, 1)}
Ø
@johnweldon1993

Answer 1

first, set one equation equal to a variable (solve for x or y).
x-y=0 ... solving for x gives you x=y
now substitute this into the next equation: x-y-2=0
substituting gives you x-x-2=0.
this results in -2=0

Answer 2

thats what i got but thats not a answer choice @JeanetteBaker

Answer 3

is "no solution" an option?

Answer 4

yes , Solve the following system of equations.

2x + y = 3

x = 2y - 1 @JeanetteBaker

Answer 5

can someone help me??

Answer 6

@BlueSlurples im trying to get help myself lol

Answer 7

@brittnicoleee_ ikr lol

Answer 8

@BlueSlurples maybe i can help you whats the problem

Answer 9

George drove 12 miles north and 12 mile west. Using a coordinate plane to represent his trip, let the y-axis run north and south, let the x-axis run east and west, and let his original position be the intersection of the axes. Which ordered pair best represents his final location?
A.) 12, -12
B.) -12,-12
C.) 12,12
D.)-12,12

Answer 10

im thinking it A @BlueSlurples

Answer 11

omfg i love you

Answer 12

@BlueSlurples yes it is indeed A....you would go up 12......and go left 12...making it 12,-12

@brittnicoleee_ idk if you ever got your answer

2x + y = 3

x = 2y - 1

you know what x equals...so plug that into the first equation

2(2y - 1) + y = 3
4y - 2 + y = 3
5y - 2 = 3
5y = 5
y = 1

if y = 1...plug that into the original first equation

2x + 1 = 3
2x = 2
x = 1

check them both in that second equation

x = 2y - 1
1 = 2(1) - 1
1 = 2-1
1 = 1


correct...so x = 1 and y = 1 :)