Solve x equal 2y and y equal x minus 2?

Answer 1

x = 2y

y = x - 2 or

x = 2y subtract 2y to both sides

x - 2 = y subtract y and add 2 to both sides

x - 2y = 0 multiply by -1 to both sides

x - y = 2

-x + 2y = 0

x - y = 2 add these two equations together

y = 2 substitute 2 for y into the first equation, x = 2y

x = 2(2) = 4

Thus the solution of these linear system of equations is the point (4, 2).

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