42x-5 = 0.52-2x
Now 4 = 22 and 0.5 = 1/2 = 2-1:
(22)2x-5 = (2-1)2-2x
24x-10 = 2-2+2x
Since the two terms are equal and have the same base, their exponents are equal:
4x - 10 = -2 + 2x
2x = 8
x = 4
Brianna S.
asked 05/12/15
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