Question 8
Solve $\begin{cases}3x+9y=7\\9x-3y=-4\end{cases}$ and find $x-y$.
TIMO - 2017 - Grade 9 - Preliminary Round - Paper 5 Question 8
TIMO · TIMO - 2017 - Grade 9 - Preliminary Round - Paper 5
TIMO · TIMO - 2017 - Grade 9 - Preliminary Round - Paper 5