Question

Q.31) Simplify the expression and find its value if a = 3
1) 7 - 2a + 3(a + 1)
2) 4a -3 + 8 -5a
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Answer 1

Answer:

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Answer 2

1) 7- 2(3) + 3(3+1)

7- 6 + 3(4)

1 + 12

= 13

2) 4(3) - 3 + 8 - 5(3)

12 - 3 + 8 - 15

9 + 8 - 15

17 - 15

= 2