Question 100833
1st:  x - 2y = -1
2nd: 3x +  y =  4
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Multiply 2nd thru by 2 to get:
3rd: 6x + 2y = 8
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Add 1st and 3rd to get:
7x =7
x = 1
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Substitute that into 1st to solve for Y:
1 -2y = -1
2y = 2
y = 1
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Check the answer in 2nd:
3*1 + 1= 4
3 + 1 = 4
4 = 4
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Cheers,
Stan H.