Mathematics
racquelm10
2016-04-09 00:58:21
5x+2y=22. -2x+6y=3 What is the X coordinate of the solution. Round to the nearest tenth
ANSWERS
Christopherhern
2016-04-09 01:44:37

multiply first example by 3 and subtract by second example, you will get the following: 3*(5x + 2y) = 3*22   =>  3*5x + 3*2y = 66      =>  15x + 6y = 66 now subtraction: (15x + 6y) - (-2x + 6y) = 66 - 3 15x + 6y + 2x - 6y = 63 15x + 2x + 6y - 6y = 63 17x = 63 x = 63/17 ≈ 3.705..... and as it says to round to the nearest tenth our answer would be: x = 3.7

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