Question

10. When Raphael solved the system below by using the method of elimination, he changed the second equationto -8x – 2y = -2. What property justifies this manipulation?8x + 3y = 74x + y = 1

Answer 1

`\begin{gathered} 8x+3y=7\ldots eqn(1) \\ 4x+y=1\ldots.eqn(2) \end{gathered}`

The property that justifies multiplying through eqn(2) by -2 is;

the rationalization to align the coefficients of x in both equations with a view to eliminating the terms in x.