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jolli1 [7]
3 years ago
15

Help! Please this is hard 8th grade

Mathematics
1 answer:
Nezavi [6.7K]3 years ago
3 0
Combine like terms in Qx + 12 = 13x + P:

x(Q-13) = P-12
                 P-12
Then x = ----------
                 Q-13

Note that Q may not = 13.  But none of the answer choices present Q = 13.

Let's go thru the answer choices one by one.  

                 P-12
         x = ---------- 
                 Q-13
                                                             -24
Check out A:  Q=12 and P= -12:  x = -------- = 24  This is OK (ONE sol'n)
                                                             -1
                                                                   -25
Check out B:  Q = -13 and P = -13:  x = ----------- = 25/26   OK
                                                                    -26
                                                                   13-12
Check out C:  Q = -13 and P = 13:    x = ------------ = -1/26 OK
                                                                  -13-13

                                                                 12-12
Check out D:  Q = 12 and P = 12:      x= ---------- = 0     OK
                                                                  12-13

It appears that in all four cases, the equation has ONE solution.
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