using trial and error method , find the value of p in the equation -4 + p = 21 .
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Step-by-step explanation:
→ -4 + p = 21
→ Let us put value of p as 20.
→ - 4 + 20 = 21
→ 16 ≠ 21
→ Now put value of p as 25.
→ -4 + 25 = 21
→ 21 = 21
→ Hence, value of p is 25.
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