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trasher [3.6K]
3 years ago
14

3x-4y=18 x 3y=-7 how do i solve this

Mathematics
1 answer:
Juliette [100K]3 years ago
8 0
3 times (2) gives 3x +9y = -21 (3) 
<span>(3) - (1) gives 13y = -39 </span>
<span>y = -3 </span>
<span>Sub. y=-3 into (2) </span>
<span>x + -9 = -7 </span>
<span>x = 2 
</span>
<span>Answer = (2,-3) </span>
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