Answer:
x=17
Step-by-step explanation:
374=8x-4+4x+17+9x+4
+4 +4
---------------------------------------
378=8x+4x+17+9x+4
-17 -17
---------------------------------------------
361=8x+4x+9x+4
-4 -4
-----------------------------------------------
357=8x+4x+9x
357=21x
357/21=17
x=17
Plug in 17 as x to check the answer.
