Question

Which ordered pairs in the form (x, y) are solutions to the equation

7x – 5y = 28?
Choose all answers that are correct.
A. (−6, −14)
B. (−1, −7)
C. (4, 10)
D. (7, 9)

Answer 1

The two ordered pairs are:

A. -6, -14

B. -1,-7

Answer 2

The correct answers are A. (-6, -14) and B. (-1, -7)

A. (-6,-14) => 7(-6) - 5(-14) = -42 - (-70) = -42 + 70 = 28

B. (-1,-7) => 7(-1) - 5(-7) = -7 - (-35) = -7 + 35 = 28

*parentheses are placed to avoid confusion. the answers became + 70 & + 35 because negative signs when multiplied become positive signs.