12000+875=12875 the total he paid
12000*x/100*4=12875
480x=12875
x=12875/480
x=26,82 %
Answer:
no they aren't
Step-by-step explanation:
no they aren't because ..........;)
To do this you must plug in 1 and negative one for each x variable and each y. that solution is a point so the 1 must be tested for x and the -1 for y. do this and solve to find a and b so that it works in both equations!