You poke your finger using the tool and it tells you what foods your allergic to.
I hope this helps even though its late.
THE TYPE OF SPATIAL DIFFUSION IS CALLED REPEATER
Try common ratio, because b represents a constant variable. (I’m not 100% but it may be this)
You would first subtract 2 and 15 from both sides so you'll get -(3x+5)= -9 and then the negative would go into the 3 and 5 so it would be -3x-5 = -9 and then you'll add 5 to both sides then divide -3 to both sides so you'll get
but since 2 negative make a positive your final answer is