Question

the coefficient of x in the sum of 12x+5y-3z and 3x+2y+5z​

Answer 1

${12x + 5y - 3z} + {3x + 2y + 5z} \\ \\ (12x + 3x) + (5y + 2y) + (5z - 3z) \\ \\ 15x + 7y + 2z$

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THEREFORE

COEFICIENT OF

X=15

Y=7

Z=2