Respuesta :
Answer:
47
Step-by-step explanation:
34x+14x
+168-12=4x-21
34x+14x+156=4x-21
Collect like terms
34x+14x-4x=-21-156
44x=-177
Divide both sides by 44
-4
Answer:
47
Step-by-step explanation:
34x+14x
+168-12=4x-21
34x+14x+156=4x-21
Collect like terms
34x+14x-4x=-21-156
44x=-177
Divide both sides by 44
-4