SOLUTION: How do i answer 4x + 3y=13 2x - 7y= 15

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Question 1045061: How do i answer 4x + 3y=13
2x - 7y= 15
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!


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Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

How do i answer 4x + 3y=13
2x - 7y= 15 
4x + 3y = 13 ------- eq (i)

2x - 7y = 15 ------- eq (ii)

- 4x + 14y = - 30 ------- Multiplying eq (ii) by - 2 ------- eq (iii)

17y = - 17 ------- Adding eqs (iii) and (i)





4x + 3(- 1) = 13 ----- Substituting - 1 for y in eq (i)

4x - 3 = 13

4x = 13 + 3

4x = 16

 

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