Question 6 (i)

Simplify the expression and find the value if $x$ is equal to 2:
x + 7 + 4(x - 5)

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Solution

x + 7 + 4(x - 5) = x + 7 + 4x - 20 = x + 4x + 7 - 20
$= 5 x - 13 = 5 \times 2 - 13$ [Putting x = 2]
= 10 - 13 = -3

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Question 6 (ii)

Simplify the expression and find the value if x is equal to 2:
3(x + 2) + 5x - 7

Question 6 (iv)

Simplify the expression and find the value ifx is equal to 2:
4(2x - 1) + 3x + 11

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x + 7 + 4 (x - 5)

Question 7 (i)

Simplify these expressions and find their values if
x = 3, a = -1, b = -2:
3x - 5 - x + 9

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x + 7 + 4 (x - 5)

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