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adelina 88 [10]
3 years ago
12

-8х - 7y = 13 -3х – 3 y = 3

Mathematics
1 answer:
AURORKA [14]3 years ago
4 0

Answer:

The solution set is (-6, 5).

Step-by-step explanation:

-8х - 7y = 13

-3х – 3 y = 3

Multiply the first equation by 3 and the second by -7:

-24x - 21y = 39

21x + 21y = -21    Adding:

-3x = 18

x = -6.

Substitute fro x in equation 1:

-8(-6) - 7y = 13

-7y =  13 - 48 = -35

y = 5.

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