Solve the system of equations by substitution. What is the solution for x?
2x + y = 1
4x + 2y = −2

x = 0

x = 2

There is no x value as there is no solution.

x can be any value as there is an infinite number of solutions.

Question

Solve the system of equations by substitution. What is the solution for x?
2x + y = 1
4x + 2y = −2

 x = 0

 x = 2

 There is no x value as there is no solution.

 x can be any value as there is an infinite number of solutions.

jim_thompson5910 · Answer

Solve the first equation for y

2x + y = 1

y = 1 - 2x

y = -2x + 1

jim_thompson5910 · Answer

Then plug this into the second equation and solve for x

4x + 2y = −2

4x + 2(-2x + 1) = −2

4x - 4x + 2 = -2

I'll let you finish

anonymous · Answer

But Beyonce had the best video of all time.

anonymous · Answer

so its  x = 2 @jim_thompson5910

anonymous · Answer

what? O.o @Eleven17

jim_thompson5910 · Answer

yeah i have no idea either...

jim_thompson5910 · Answer

4x - 4x + 2 = -2 

0x + 2 = -2 

0+2 = -2

2 = -2

is that true?

anonymous · Answer

im not sure but i think so @jim_thompson5910

jim_thompson5910 · Answer

2 is NOT equal to -2

jim_thompson5910 · Answer

so 2 = -2 is NOT true

jim_thompson5910 · Answer

therefore, there are NO solutions

jim_thompson5910 · Answer

there's no set of numbers for x and y that will solve the original system

anonymous · Answer

THANK YOU!!!!!!!!!!!!!!!!!!!! @jim_thompson5910

jim_thompson5910 · Answer

you're welcome