Question 10920
2(-5a+7)=-a


First remove the parentheses by the distributive property:
-10a + 14 = -a


Next, you need to get the variable terms on one side (in this case preferably the right side by adding 10a to each side!):

{{{-10a + 10a + 14 = -1a + 10a}}}
{{{14 = 9a}}}


Finally, divide both sides by 9:
{{{14/9 = (9a)/9 }}}
{{{14/9 = a}}}


R^2 at SCC