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प्रश्न
Simplify the expression and find the value if x is equal to 2:
x + 7 + 4 (x - 5)
उत्तर
x + 7 + 4(x - 5)
= x + 7 + 4x - 20
= (1 + 4)x + (7 - 20)
= x + 4x + 7 - 20
= 5x - 13
Putting x = 2 we get,
= 5x - 13
= (5 × 2) - 13
= 10 - 13
= -3
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