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Ex 12.3, 7 - Chapter 12 Class 7 Algebraic Expressions - Part 4


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Ex 12.3, 7 Simplify these expressions and find their values if x = 3, a = –1, b = -2 (iv) 10 – 3b – 4 – 5b 10 – 3b – 4 – 5b = b (–3 − 5) + (10 − 4) = b (−8) + 6 = −8b + 6 Putting b = −2 = −8(−2) + 6 = 16 + 6 = 22

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