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Ex 12.3, 7 - Chapter 12 Class 7 Algebraic Expressions - Part 3

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Ex 12.3, 7 Simplify these expressions and find their values if x = 3, a = –1, b = -2 (iii) 3a + 5 – 8a + 1 3a + 5 − 8a + 1 = a (3 − 8) + (5 + 1) = a (−5) + 6 = −5a + 6 Putting a = −1 = −5 (−1) + 6 = 5 + 6 = 11

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