Answer:
-3
Explanation:
1) first combine all the like terms(terms with same variables or terms without any variable) together
1-7=-6
-6-7x=15
add 6 on both sides to remove it
-7x=21
divide both sides by -7
x=-3
Hope this helps
So first we combine like terms on the left
then we have
-7x-6=15
next we add 6 both sides
+6 +6
then we divide -7 each side
we get
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