SOLUTION: x(7x-5)+4=7x(x-4)+x

Question 259475: x(7x-5)+4=7x(x-4)+x
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
x(7x-5)+4=7x(x-4)+x
7x^2-5x+4=7x^2-28x+x
7x^2-7x^2-5x+28x-x=-4
22x=-4
x=-4/22
x=-2/11 ans.
Proof:
-2/11(7*-2/11-5)+4=7*-2/11(-2/11-4)-2/11
-2/11(-14/11-5)+4=-14/11(-2/11-44/11)-2/11
-2/11(-14/11-55/11)+4=-14/11*-2/11-14/11*-44/11-2/11
28/121+110/121+484/121=28/121+616/121-22/121
622/121=622/121
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