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25-01-2017
Mathematics

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what is 4x+2y=5y+7 8x+3y=41 using addition method

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texaschic101 texaschic101

25-01-2017

4x + 2y = 5y + 7
4x - 3y = 7

4x - 3y = 7
8x + 3y = 41
----------------add
12x = 48
x = 48/12
x = 4

8x + 3y = 41
8(4) + 3y = 41
32 + 3y = 41
3y = 41 - 32
3y = 9
y = 9/3
y = 3

solution is (4,3)

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