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Veseljchak [2.6K]
4 years ago
10

25 points pls help me quickly

Mathematics
2 answers:
lianna [129]4 years ago
7 0

7x+10y=36

y=2x+9

7x+10y=36

-2x+y=9 /*10

7x+10y=36

20x-10y=-90

+---------------------

27x=-54 //27

x=-2

-2(-2)+y=9

y=5

x=-2

y=5

daser333 [38]4 years ago
3 0

Answer:

x = -2, y = 5

Step-by-step explanation:

7x + 10y = 36

y = 2x + 9

7x + 10(2x + 9) = 36

7x + 20x + 90 = 36

27x = -54

x = -2

y = 2(-2) + 9

y = -4 + 9

y = 5

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