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Sophie [7]
3 years ago
12

X = 2y − 4 7x + 5y = −66

Mathematics
1 answer:
ivolga24 [154]3 years ago
3 0

Answer:

Step-by-step explanation

Substitute 2y-1 for x in the second equation:

7x + 5y = -66

7(2y-4) + 5y = -66

then solve for y:

14y - 28 + 5y = -66

19y = -38

y = -2

Substitute -2 for y in the first equation:

x  = 2y - 4

x = 2(-2) - 4

x = -8

The lines intersect at (-8,-2)

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