Question

Solve the equation

4y - 7 = 15

Justify your answer

Answer 1

Answer: y = 5 ½ or y = 5.5

Explanation:

4y - 7 = 15

Add 7 to both sides of the equation.

4y = 22

Divide both sides by 4

y = 5.5

Substitute y in the original equation.

4(5.5) - 7 = 15

22 -7 = 15

True.

Answer 2

Given :

• 4y - 7 = 15

To Find :

• Value of y = ?

Solution :

`\tt \dashrightarrow 4y - 7 = 15`

`\tt \dashrightarrow 4y = 15 + 7`

`\tt \dashrightarrow 4y = 22`

`\tt \dashrightarrow y = \cancel{(22)/(4)}`

`\tt \dashrightarrow y = (11)/(2)`

`\tt \dashrightarrow y = 5.5`

`\large \underline{\boxed{\bf{y = 5.5}}}`

Hence, value of y = 5.5.