dianamachado14
04.07.2019 •
Mathematics
Solve the system of equations using the linear combination method. 2x−5y=−1 3x+4y=−13
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Ответ:
(-3, -1)
Step-by-step explanation:
2x - 5y = -1 ⇒ -3(2x - 5y = -1) ⇒ -6x + 15y = 3
3x + 4y = -13 ⇒ 2(3x + 4y = -13) ⇒ 6x + 8y = -26
23y = -23
y = -1
2x - 5y = -1
2x - 5(-1) = -1
2x + 5 = -1
-5 -5
2x = -6
=
x = -3
x = -3, y = -1
Ответ: