Your answer is 3.
You wanna multiply both sides of the equation by 5
2w - 1 + 5w + 10 = 10w
Combine the 2w and 5w and you should get 7w
7w - 1 + 10 = 10w
Add -1 and 10 to get 9
7w + 9 = 10
Subtract 10w from both sides
7w + 9 - 10w = 0
Combine 7w and -10w to get -3w
-3w + 9 = 0
Subtract 9 from both sides. Anything subtracted from zero gives its negation
-3w = -9
Divide them
W= -9/-3
3 \ 9 = 3
W= 3
Hoped it help ;—;