Question

System solving! 4x + 5y - 3 = 0 3x - 7y - 13 = 0 Work must be shown, thanks!

Answer 1

4x + 5y - 3 = 0
4x + 5y = 3

3x - 7y - 13 = 0
3x - 7y = 13

4x + 5y = 3......multiply by 3
3x - 7y = 13....multiply by -4
---------------
12x + 15y = 9 (result of multiplying by 3)
-12x + 28y = - 52 (result of multiplying by 4)
---------------add
43y = -43
y = -43/43
y = -1

3x - 7y = 13
3x - 7(-1) = 13
3x + 7 = 13
3x = 13 - 7
3x = 6
x = 6/3
x = 2

so ur solution is : (2,-1) <==