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Mathematics
Reina Henson
4 September, 17:23
3) 5x+4y=-30
3x - 9y=-18
+4
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1
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Mclaughlin
4 September, 19:54
0
Step-by-step explanation:
5x+4y=-30 ... (1)
3x - 9y=-18 ... (2)
divid (2) by : 3
x - 3y = - 6 so x = 3y - 6 ... (*)
put this value for x in (1) : 5 (3y - 6) + 4y = - 30
15y - 30 + 4y = - 30
19y = 0 so : y = 0 put this value in (*) : x = 3 (0) - 6 ... x = - 6
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