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# What should be subtracted from

Q. 4.    (b) What should be subtracted from $2a+8b+10$  to get $-3a+7b+16 ?$

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Let the term be c which must be subtracted from 2a + 8b + 10 to get -3a + 7b + 16

$\\2a + 8b + 10 - c = -3a + 7b + 16 \\c = 2a + 8b + 10 - (-3a + 7b + 16) \\c = 2a + 8b + 10 + 3a - 7b - 16 \\c = (2 + 3)a + (8 - 7)b + 10 - 16 \\c = 5a + b - 6$

5a + b - 6 must be subtracted from 2a + 8b + 10 to get -3a + 7b + 16

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