this is an algebra II problem
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(a+3)x = a+b -5
so x = (a + b - 5)/ ( a + 3 )
so x = (a + b - 5)/ ( a + 3 )
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ax + 3x + 5 = a + b
x (a + 3) + 5 = a + b
x (a + 3) = a + b - 5
a + b - 5
------------- = x
(a + 3)
x (a + 3) + 5 = a + b
x (a + 3) = a + b - 5
a + b - 5
------------- = x
(a + 3)