Question

What should be subtracted from a + 3b – 10 to get 7a – 4b + 15?​

Answer 1

Answer:

let the term subtracted be k

a+3b - 10 - k = 7a-4b+15

a+3b-10 -(7a-4b+15) = k

a+3b-10 - 7a +4b - 15 = k

-6a+7b-25 = k

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