Can somebody who has done word problems plz help give the correct equations for each one :DD thanks! WILL MARK BRAINLIEST WHOEVER ANSEERS THEM FIRST :D

18. x + 7 = 21

19. x - 55 km = 1000 km

logv3(x+2)=1

rewrite in exponential form:

logb(x) = y is equal to b^y =x

b = 3, y = 1

now solve for x:

3^1 = x+2)

x = 3-2

x = 1

see the picture for the graph.

answer: i think one of the answer is $150 and $300?

step-by-step explanation: