Question

Linear equations for Pre-IB Algebra 2. Solve for s, R(s + t) = st.
Every time i do this i get down to s= -Rt / R-t and i put it in and it says that i am wrong. Would the (-) in the denomination t cancel out the (-) of the numerator R?
Please help...

Answer 1

R(s + t) = st

Rs + Rt = st

Rs - st = -Rt

s ( R - t) = -Rt

*s = - Rt / (R - t) Multiply through by -1 on the right.

*s = Rt / (t - R) Put in the brackets in your answer. What you have been writing means

s = Rt/r - R you need the brackets. The stars mean that either could be an answer. I think your problem could be the brackets. Now I'm reasonably certain this is correct.