Hello! :)
To find you equation, we will first simplify both sides of the equation
10x - 3x + 5 = 26
10x + -3x + 5 = 26
(10x -3x) + (5) = 26
7x + 5 = 26
7x +5 = 26
Now, we will subtract 5 from both sides
7x + 5 - 5 = 26 - 5
7x = 21
At last, we will divide both sides by 7
7x/7 = 21/7
x=3 (Answer)
Hope this helped you!
THEDIPER