SOLUTION: I don't know if this is Algebra but I need help. What is the answer to x-(4x-7)=5x-(x+21)

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Question 639672: I don't know if this is Algebra but I need help. What is the answer to x-(4x-7)=5x-(x+21)
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
What is the answer to
x - (4x-7) = 5x - (x+21)
removing brackets will change the signs, same as mult the inside terms by -1
x - 4x + 7 = 5x - x - 21
-3x + 7 = 4x - 21
7 + 21 = 4x + 3x
28 = 7x
x = 28/7
x = 4
:
:
Check solution in the original problem, replace x with 4
4 - (4(4)-7) = 5(4) -(4+21)