hokamidat
01.07.2019 •
Mathematics
What is the solution? y=-x+21 y=-2x+30 a. (8,12) b. (9,11) c. (8,11) d. (9,12)
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Ответ:
-x + 2x = 30 - 21
x = 9
y = -2x + 30
y = -2(9) + 30
y = -18 + 30
y = 12
solution is (9,12)
Ответ:
6358 money in her account at the end of last year