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Solve using elimination, 2x+5y=2   3x-5y=53
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5 votes
Solve using elimination, 2x+5y=2   3x-5y=53

User Guilherme Bernal
by
8.6k points

2 Answers

4 votes
2x+5y=2
3x-5y=53
---------------
+
2x+3x=2+53
5x=55 / : 5
x=11

x=11
3x-5y=53

x=11
3*11-5y=53

x=11
33-5y=53

x=11
-5y=53-33

x=11
-5y=20 / : (-5)

x=11
y=-4

User Alex Zak
by
7.5k points
4 votes
2x + 5y =2
(+) 3x - 5y =53
-------------------------
5x + 0 = 55

Then finish it.

5x = 55
x = 11

Substitute x = 11,

2(11) + 5y = 2
22 - 2 + 5y = 0
20 + 5y = 0
5y = -20
y= -4

User Smilu
by
8.2k points
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