Question 289127
It really doesn't matter the order you do things in; however, in the first example, if you subtract 10 from both sides, you get:
{{{2 - 7x = -5x}}}

Next, I would add 7x to both sides:
{{{2 = 2x}}}
{{{x = 1}}}

All that matters, is you eventually "isolate" the variable on one side, and the result will be on the other side of the "=".