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प्रश्न
Find x: (7x – 5) – 4(2 + 5x) = 10(2 – x)
उत्तर
Expanding the brackets,
7x – 5 – 4 × 2 – 4 × 5x = 10 × 2 + 10 × (– x)
7x – 5 – 8 – 20x = 20 – 10x
7x – 13 – 20x = 20 – 10x
Transposing 10x and – 13, we get
7x – 13 – 20x + 10x = 20
7x – 20x + 10x = 20 + 13 ......(Simplifying)
7x – 10x = 33
– 3x = 33
3x = – 33
x = `(-33)/3` = – 11
x = – 11
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