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X+3y=-5 4x-y=6 solve by elimination please
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4 votes
X+3y=-5
4x-y=6

solve by elimination please

User Carlos Pereira
by
8.3k points

1 Answer

1 vote
Multiply the second equation by 3, so 4x-y=6 becomes 12x-3y=18.

x + 3y = -5
+ (12x-3y = 18)
______________
13x = 13

So x = 1

Plug x = 1 into any of these, such as 1 + 3y = -5, which becomes 3y = -6, and then y = -2.
x = 1
y = -2
User Trevor Eyre
by
8.1k points
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