need guidance on an algebra problem
posted by Nikki .
2(x-y)+8y = 28
20 x+3y-3=11 - Is this correct?
2x+14y = 28
Using the addition method, would you multiply the first problem by 2 and the second by 20?
No. In the second multiply out, you should have gotten
2x -1y+8y=28 or
No, in the addition method
multiply the second equation by ten, then subtract one from the other.
Bob, I read the questions as
x+3(y-1)=11 ------> x+3y = 14 and
2(x-y)+8y = 28----> 2x-2y+8y=28 or x+3y=14
which are two identical equations.
I think the 20 was the question number.