Respuesta :

7x−21=4x+20
7x=4x+20+21
7x=4x+41
7x−4x=41
3x=41
The anwser is X=41/3



7(x-3)=4(x+5)
7x-21=4x+20
-4x. -4x
-------------------
3x-21=20
+21 +21
------------------
3x. = 41
---- ----
3. 3

The answer is 41/3
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