Question 1170943

how do you solve for y=x+6 and y=-2x please
<pre>y = x + 6 ----- eq (i)
y = - 2x ------ eq (ii)
- 2x = x + 6 ------ Substituting - 2x for y in eq (i)
- 2x - x = 6
- 3x = 6
{{{highlight_green(matrix(1,5, x, "=", 6/(- 3), "=", - 2))}}}
y = - 2 + 6 ------ Substituting - 2 for x in eq (i)
{{{highlight_green(matrix(1,3, y, "=", 4))}}}