Question

Subtract a+2b-3c from the sum of 2a+4b+7c and 2a-5b+3c​

Answer 1

1. (2a+4b+7c+2a-5b+3c) - (a+2b-3c)
2. 4a-b+10c - a-2b+3c
3. 3a-3b+13c

Answer 2

SOLUTION:-

Add

2a+4b+7c and 2a-5b+3c

2a+4b+7c

2a-5b+3c

__________

4a-1b+10c

Need to subtract a+2b-3c from the sum of 2a+4b+7c and 2a-5b+3c

We already find the sum of 2a+4b+7c and 2a-5b+3c

Sum is 4a-1b+10

Now,

Subtract !

4a -1b+10c

a + 2b -3c

- - +

__________

3a -3b +13c

__________

Hence , we find 3a-3b+13c

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