2d = d + 11 + 11 First, write out the equation.
2d = d + 22 Then, combine like terms.
2d - d = d - d + 22 Move all the d to one side of the equation by subtracting. You MUST subtract from both sides since what you do to one side, you must do to the other.
d = 0 + 22 Here, the d - d cancel, leaving you with 0d, or more simply, zero.
d = 22 This is your answer.
If you put it into the original equation it checks.
2d = d + 11 +11
2(22) = 22+ 11 + 11
44 = 44
2d = d + 11 + 11 First, write out the equation.
2d = d + 22 Then, combine like terms.
2d - d = d - d + 22 Move all the d to one side of the equation by subtracting. You MUST subtract from both sides since what you do to one side, you must do to the other.
d = 0 + 22 Here, the d - d cancel, leaving you with 0d, or more simply, zero.
d = 22 This is your answer.
If you put it into the original equation it checks.
2d = d + 11 +11
2(22) = 22+ 11 + 11
44 = 44
