Two equations are given below: a - 3b = 28 a = b - 2 what is the solution to the set of equations in the form (a, b)? (1 point) (-12, -10) (-15, -13) (-17, -15) (-18, -16)

1 answer
Question:

two equations are given below:
a - 3b = 28
a = b - 2
what is the solution to the set of equations in the form (a, b)? (1 point)
(-12, -10)
(-15, -13)
(-17, -15)
(-18, -16)

Answers

Because you know what A is equal to in terms of B, you can replace the A in the first equation with b-2, since we know that that also equals A. This makes the new equation b - 2 - 3b = 28. You can simplify this to -2b = 30. This makes B = -15. if you put this into the second equation now, -15 - 2 = A. This makes A = -17. I hope I could help to explain and answer this!

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