SOLUTION: 3y – 7x = –29 7x + 11y = 1 by elimination method

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Question 1043970: 3y – 7x = –29
7x + 11y = 1
by elimination method
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
system%283y-7x=-29%2C7x%2B11y=1%29

Rewrite so each equation is in the same format.
system%28-7x%2B3y=-29%2C7x%2B11y=1%29

Already set for eliminating the x terms to get y. No changes for that.
Add corresponding members of the equations.


Do this to eliminate y:
system%28%28-11%29%28-7x%2B3y%29=%28-11%29%28-29%29%2C3%287x%2B11y%29=3%2A1%29

Answer by MathTherapy(10551) About Me  (Show Source):
You can put this solution on YOUR website!

3y – 7x = –29
7x + 11y = 1
by elimination method
3y - 7x = - 29_____- 7x + 3y = - 29 ------- eq (i)

7x + 11y = 1 ------- eq (ii)

14y = - 28 ------- Adding eqs (ii) & (i)

highlight_green%28matrix%281%2C3%2C+y+=+%28-+28%29%2F14%2C+or%2C+-+2%29%29

Substitute - 2 for y in either eq (i) or eq (ii) to determine the value of x