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

2x + y = 1
4x + 2y = −2

Question

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

diyadiya · Answer

Ok lets re-write the first equation 
2x+y=1
 subtract 2x from both sides
y=1-2x

Substitute this value of y in the second equation 
4x+2y=-2

4x+ 2(1-2x)=-2

Now find x

anonymous · Answer

Pick your favorite of the two equations and your favorite of the two variables.
Solve that equation for that variable.
Going now to the OTHER equation, substitute in for that variable and solve.

anonymous · Answer

As Diddy has so kindly demonstrated.

anonymous · Answer

Thank you guys .

diyadiya · Answer

@Kaylaaa  understood ?

anonymous · Answer

Yes , thankk youuu.

diyadiya · Answer

You're Welcome :)

anonymous · Answer

My pleasure =)
Once you have the one variable solved, it's easy to substitute into either of the first equations and find the other variable.