Question

16. - 2y +5=-1Is 3 the solution?17. 1.3m -5.6 = -3Is-2 the solution?

Answer 1

To find out if a certain value of the variable is the solution of the equation we plug this value into the equation:

$\begin{gathered} 1.3(-2)-5.6=-3 \\ -2.6-5.6=-3 \\ -8.2=-3 \end{gathered}$

Since the last line is not true, then we conclude that -2 IS NOT the solution.