-21 - (-13)
-21 + 13
= -8
The answer B)
21-8=13 so hope that helps x
Step-by-step explanation:
Sum of 20 terms in thr arithmetic sequence adds up to -1930
Answer:

Step-by-step explanation:
multiply first equation by 4 and second by 3 respectively:

combine the equations:

divide both sides by -48:

substitute the value of y to the second equation

simplify multiplication:

cancel 12 from both sides:

divide both sides by 4

therefore our solution is
