Question 159585
Solve each system of linear equations.
y=x+2
y=2x 
:
Look at the 2nd equation, that means any place in the problem that y occurs,
you can replace it with 2x, right?
:
Take the 1st equation, replace y with 2x, then solve for x
2x = x + 2
2x - x = +2, subtracted x from both sides
x = 2
:
You can use either equation to find y. Replace x with 2, using the 2nd equation:
y = 2(2)
y = 4
:
This is called the substitution method, there are other methods you can use
:
Check solution in 1st equation, by replacing x with 2 and y with 4, to see if equality reigns:
y = x + 2
4 = 2 + 2; confirms your solutions,  did this help?