Explicación paso a paso:
a(a+b)-x(a-b) bx
---------------- = -------------
(a-b)(a+b) a^2-b^2
a^2+ab-ax +bx. bx
--------------------- = -----------
a^2 -b^2. a^2-b^2
a^2 + ab = ax
a( a+b)
---------- = x
a
a+b = x
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Verified answer
Explicación paso a paso:
a(a+b)-x(a-b) bx
---------------- = -------------
(a-b)(a+b) a^2-b^2
a^2+ab-ax +bx. bx
--------------------- = -----------
a^2 -b^2. a^2-b^2
a^2 + ab = ax
a( a+b)
---------- = x
a
a+b = x