Answer:
[tex]x=-7[/tex]
Step-by-step explanation:
We can write them both like functions like this
[tex]A=5x-4[/tex]
[tex]B=3x+8[/tex]
Where
x=input
A=Output A
B=Output B
We want the output of A 3 times the output of B this can be written like this:
[tex]A=3B[/tex]
we replace with the functions
[tex]5x-4=3(3x+8)[/tex]
we solve for x
[tex]5x-4=9x+24\\5x-9x=24+4\\-4x=28\\x=\frac{28}{-4}\\x=-7[/tex]
The output that makes the out put of A 3 times teh output of B is [tex]-7[/tex]
