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प्रश्न
Solve the following equation: 7x - 2 = 4x + 7
उत्तर
7x - 2 = 4x + 7
⇒ 7x - 2 + 2 = 4x + 7 + 2 ..(Adding 2 to both sides)
⇒ 7x = 4x + 9
⇒ 7x - 4x = 4x + 9 - 4x ...(Substracting 4x from both sides)
⇒ 3x = 9
⇒ `"3x"/3 = 9/3` ...(Dividing by 3)
∴ x = 3
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