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tatyana61 [14]
3 years ago
9

-3x+2y=-39 and 5x+4y=21 Algebra elimination

Mathematics
2 answers:
Marrrta [24]3 years ago
8 0
X = 9 Y = -6

Hope this helps!!✌
rodikova [14]3 years ago
7 0
Multiply the first equation by 2
-6x + 4y = -78
5x + 4y = 21
Subtract those two equations
-11x = -99
X = 9
Plug in 9 for x in one of the equation
-3(9) + 2y = -39
-27 + 2y = -39
2y = -12
Y = -6
In conclusion, x = 9, y = -6
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