Essentially, you just need to combine like terms to simplify the equation and then solve for your g. If it were minus 3g:

1.) combine like terms: subtract 10 from both sides and combine your g’s

26 = g + 10 – 3g

26 – 10 = g – 3g + 10 – 10

16 = -2g

2.) solve for g: divide both sides by -2

16 = -2g

16/-2 = -2g/-2

-8 = g

This is how you would answer it. If there is another function between the 10 and the -3g, then use the same steps, but take that into account.

since you have g and -3g….combine them and you get -2g so now it is 26=10-2g now move the 10 to the other side of the equation by subtracting 10 from both sides..

you get 16= -2g now you need to get g alone..so you divide both sides by -2…and you get g= -8

P.S. It does not matter if it is minus 3g or negative 3g..it is the same thing..if it were minus negative 3g..then it would turn into positive 3g