X=y-9 x+y=6 3x+y=7 2y+x=6 5x-2y=9 9x-4y=-7 4x+2y=6 2x-5y=9

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вопрос

We can solve this system of equations by substitution or elimination method. We need to solve for y first:

1) X = y - 9
2) x + y = 6

Substitute equation 1) into equation 2):

y - 9 + y = 6
2y - 9 = 6
2y = 15
y = 7.5

Substitute y = 7.5 back into equation 1) to solve for x:

x = 7.5 - 9
x = -1.5

Therefore, the solution to the system of equations is x = -1.5 and y = 7.5.