Question

solve the following :
● 3y+8=3+y
●2x-3=7/2
●3(x-7)=45
●2x-1/2=11/2​

Answer 1

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Answer 2

Solution :

1) 3y + 8 = 3 + y

→ 3y - y = 3 - 8

→ 2y = -5

→ y = -5/2 [ Answer ]

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2) 2x - 3 = 7/2

→ 2x = (7/2)+3

→ 2x = 13/2

→ x = 13 / 4 [ Answer ]

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3) 3(x-7) = 45

→ x - 7 = 45/3

→ x - 7 = 15

→ x = 15 +7

→ x = 22 [ Answer ]

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4) 2x - 1/2 = 11/2

→ 2x = 11/2 + 1/2

→ 2x = 12/2

→ 2x = 6

→ x = 6/2

→ x = 3 [ Answer ]

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Some identities :-

★ (a+b)² = a² + 2ab + b²

★ (a-b)² = a² - 2ab + b²

★ a² + b² = (a+b)² - 2ab

★ a² - b² = (a+b) (a-b)