Question

solve the following simultaneous equation:

5x+2y=29
x-y=-4

2x-y=-1
3x-y=2

5x+y=16
x-2y=1

5x+2y=16
-3x+4y=-7

3x+2y=19
5x-2y=5

7x-1/3-2(7y+3)/5=10/3

5x+2/4+3y-2/5=16/5

Answer 1

I'll show you how to do the first oner. You try the others using the same method.

5x +2y = 29
x - y = -4

Double the last equation (both sides)
2x -2y = -8

Add the first and third equations.

7x = 21

x = 3