Question

. From the set {1, 5, 7}, use substitution to determine which value of x makes the equation true.

14x + 7 = 77
A. 7
B. 1
C. none of these
D. 5

Answer 1

first replace x by 1
and if you get both side equal then that's ur answer if not then 1 isn't the right answer
replace x by 5 samething solve left side if both side equal then 5 is the answer
replace x by 7 solve if both side are equal or not ?