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Solve using elimination. 8x + 7y = 9 8x + 10y = –18 please help i am in desperate need of math help

Solve using elimination. 8x + 7y = 9 8x + 10y = –18 please help i am in desperate need of math help
115k views
15 votes
Solve using elimination.

8x + 7y = 9
8x + 10y = –18

please help i am in desperate need of math help

User Pepster
by
7.5k points

2 Answers

5 votes

Answer:

x=9, y=-9

Explanation:

pic attached with step by steps

Solve using elimination. 8x + 7y = 9 8x + 10y = –18 please help i am in desperate-example-1
Solve using elimination. 8x + 7y = 9 8x + 10y = –18 please help i am in desperate-example-2
User Kyborek
by
8.2k points
9 votes
8x + 7y = 9
8x + 10y = -18
Subtract.
-3y = 27
Divide.
y = -9
Plug y (-9) back in:
8x - 63 = 9
Solve.
8x = 72
Divide.
x = 9

Answer: (9, -9)
:)
User Chill
by
8.8k points
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