A sofa and a chair cost $850 as a set. The sofa cost $100 more than twice as much as the chair?

Question

I need 2 equations

I got

x + y = 850

x = 2y + 100

x= sofa

y = chair

is that right also I need to solve for x and y

Answer 1

Yes.

Thats right.

To solve, just do backwards equation.

2y+100=2 divde y-100

=2 divided by y.

But I don't know what y equal. List it in additional details and I will finish my equation.

Answer 2

You've got it.  Take the second equation, insert it into the first [x] and solve for y.  You'll get 2y+100+y=850.  y=250.  x=600.