2/(4-x) = 10/ (4+x) ???? if x is 4 or - 4 blows up, zero denominator
so
40 - 10 x = 8 + 2 x
32 = 12 x
Show that 2 10
—— = ——
4 - x 4 + x
Is equivalent to 12x = 32 for all values of x not equal to 4 or -4.
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