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5x+2y=21-x-y=-9 what is the answer

5x+2y=21-x-y=-9 what is the answer
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4 votes
5x+2y=21-x-y=-9 what is the answer

asked
User Arcord
by
8.8k points

1 Answer

4 votes
5x + 2y = 21 ⇒ 5x + 2y = 21
-1x - 1y = -9 ⇒ 5x + 5y = 45
-3y = -24
-3 -3
y = 8
5x + 2(8) = 21
5x + 16 = 21
- 16 - 16
5x = 5
5 5
x = 1
(x, y) = (1, 8)
answered
User Roberto Barros
by
8.1k points
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