Teaching DSSSB PRT 2023 Mock Test Quantitative Aptitude Algebra Polynomials

If the coefficients of x, y and xy in the sum of the expressions 5x - 7y + 2, 3y - 4x + 2xy and 2x - 3xy - 5 are p, q and r, respectively, then the value of p + q - r is:

1
6
2
0
3
-2
4
-6
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