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Mathematics, 19.02.2021 07:00 Ramar59

I. 2a + 2b - c + d = -5 II. a + b + d = -2

III. 3a - b + 2c -d = 18

IV. 4b = -c

Hint:

Solve for c first in IV.

Solve for any variable in II next.

Solve I then.

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I. 2a + 2b - c + d = -5 II. a + b + d = -2

III. 3a - b + 2c -d = 18

IV. 4b =...

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