subtract the sum of (2x-3y+4z) and (-3y+4x-15z) from the sum of (12x-15y) and (19x-34z)
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Step-by-step explanation:
adding
2x-3y+4z-3y+4x-15z
2x-6y-11z.................(1)
adding
12x_15y+19x-34z
31x-15y-34z.............(2)
subtracting eqn 2from 1
31x -15y - 34z-2x +6y +11z
29x-9y-23z
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