if A= 2x+4y ,B= 3 y+ 4 z and C= 4 x+ 5z then ( A+B+C) = (a) 2x+ 3y+ 5z ( b) 6 x+7y+9z (c) 6x+4y+5z (d) 4x+4y+4z
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Answer:
b) 6 x + 7y + 9z
Step-by-step explanation:
A+B+C = 2x + 4y + 3y + 4z + 4x +5z
= 6x + 7y + 9y
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