Determine whether each x-value is a solution (or an approximate solution) of the

Mathematics
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Determine whether each x-value is a solution (or an approximate solution) of the equation.

23x + 5 = 128
(a)    x = –2

(b) x=2

May 3rd, 2015

2^3x+5=2^7

3x+5=7

3x=2

x=2/3......... both of the two values of x are not the solution for x.....best me?

May 3rd, 2015

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May 3rd, 2015

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