x= 1st number
y = 2nd number
x-y = -3 1st equation
2x +3y = 29 2nd equation
multiply the 1st equation by 3
3x - 3y = -9
add this to the 2nd equation
3x - 3y = -9
2x +3y = 29
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5x = 20
divide each side by 5
5x/5 = 20/5
x =4
x-y = -3
4 -y = -3
subtract 4 from both side
-y = -3-4
-y = 7
divide by -1
y =7
the two numbers are 4 and 7