Asked by sam

Please help me with this and if you can explain please, okay so i have x-y=0 and x-2y=6 i have to solve by using substitution, at first i though i can replace x-2y=6 with x but then i notice that i can't can i put one of the equations into y=? Please help me with this thank you
Answered by kelvin
from x-y=0 then x=y.substitute into
x-2y=6 it will be y-2y=6,which y= -6 and since x=y then x= -6
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