Question

Find a such that the solution set of ax+3=15 is {-3}
Please show your work.

Answer 1

a(-3) + 3 = 15
-3a = 12
a = -4

Answer 2

how did you now to replace the x with (-3)??

Answer 3

??

Answer 4

hmm it says -3 is the solution set so i can put -3 instead of x

for f(x) = 0
x = -3
where f(x)=ax + 3 - 15