Find the variables 145+x=3x+45

145 + x = 3x + 45

you want to get all the x's onto one side; you can do this by subtracting 1x from both sides of the equation:

145 + x = 3x + 45

-x - x

Now you are left with:

145 = 2x + 45

you want to have all the numbers without the x variable on the other side to solve for x; you can do this by subtracting 45 from both sides of the equation to isolate 3x:

145 = 2x + 45

-45 - 45

Now you have:

100 = 2x

divide both sides by 2 to solve for x

100/2 = 50

Final answer: x = 50