In order to calculate the new equation, we just need to multiply every term in the equation by (-2). So we have that:
[tex]\begin{gathered} (2a+3b=5)\cdot(-2) \\ 2a\cdot(-2)+3b\cdot(-2)=5\cdot(-2) \\ -4a-6b=-10 \end{gathered}[/tex]
So the answer is the first option.
