➷ x - 7 = 13
Add 7 to both sides:
x = 20
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Answer:
20
Step-by-step explanation:
x - 7= 13
+7 +7
by definition : The inverse of a relation consisting of points of the form (x,y) is the set of points (y,x)
if (1,7) is a point belong to f(x), then the inverse has to be (7,1) not (8,1)