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Simplify These Expressions and Find Their Values If X = 3, A = − 1, B = − 2. 2a - 2b - 4 - 5 + A - Mathematics

Simplify these expressions and find their values if x = 3, a = − 1, b = − 2.

2a - 2b - 4 - 5 + a

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Solution

2a - 2b - 4 - 5 + a = 2a + a - 2b - 4 - 5

= 3a - 2b - 9s

= 3 × (-1) - 2 (-2) - 9

= -3 + 4 - 9 = -8

  Is there an error in this question or solution?
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APPEARS IN

NCERT Class 7 Maths
Chapter 12 Algebraic Expressions
Exercise 12.3 | Q 7.5 | Page 242
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