5x - 4x = x
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-x2+2x
If: 5x = 4x+7 Then: 5x-4x = 7 And: x = 7
Separate and simplify the common terms. 5x^2 - X^2 = 4x^2 -7x - 2x = -9x Now put these terms back together 4x^2 - 9x Or if simplified further, you get: x(4x-9)
That will depend entirely on the plus or minus values of the given terms which have not been included and whether or not it is an equation.
-5x + 2(4x-10)=10