Solve the system of equations by substitution. What is the solution for x?

2x + y = 1
4x + 2y = −1

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 = −1 

 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.

jiteshmeghwal9 · Answer

First find the value of 'x' from one of the equations.

hartnn · Answer

isolate y from first equation, y=...?
substitute in 2nd equation.

jiteshmeghwal9 · Answer

$$2x+y=1$$$$x=\frac{1-y}{2}$$put this value in other equation

anonymous · Answer

how do u figure out y

hartnn · Answer

u don't, u just find y in terms of x from 1st equation
2x+y=1
y=1-2x 
ok?
now put this in 2nd equation.
4x + 2y = −1

hartnn · Answer

any ideas how ?