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Mathematics
Esther Reynolds
14 July, 08:58
Solve the system:
5y+8 (x-3y) = 7x-12
9x+3 (x-9y) = 11y+46
+4
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1
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Mo
14 July, 12:44
0
5y+8 (x-3y) = 7x-12
5y+8x-24y=7x-12
8x-7x + 5y-24y = - 12
X - 19y = - 12
9x+3 (x-9y) = 11y+46
9x+3x - 27y = 11y + 46
12x - 27y - 11y = 46
12x - 38y = 46
Now joining together
X - 19y = - 12
12x - 38y = 46
Multiple by 12 the first equation and Substract after
12x - 228y = - 144
12x - 38y = 46
- 190y = - 98
Y = 1.9
12x - 38y = 46
12x - 38 (1.9) = 46
12x - 73.67 = 46
12x = 46 + 73.67
12x = 119.67
X = 9.97
So the answer are:
X = 9.97
Y = 1.9
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