please give the solution of question no.15

please give the solution of question no.15 20. 22. 23. - • find 32. Find the 12 v"ue of B rite the in Corm : • • find of of the 83, Ond the value Of a' 4 — 9(2a-bY -b) - 2S- Is divisible by 2. find the

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