We are given the equation
4x + 210 - 2x = 260
Firstly, we need to collect the like terms
4x - 2x + 210 = 260
2x + 210 = 260
Secondly, Make 2x the subject of the equation
2x = 260 - 210
2x = 50
Divide both sides by 2
2x/2 = 50/2
x = 25
The answer is 25