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Chapter 2: Q10. (page 110)

Solve each equation. Check your solution.

鈭�21=7鈭�4y

Short Answer

Expert verified

The solution of given equation is y=7.

Step by step solution

01

Step 1. Given equation.

鈭�21=7鈭�4y

02

Step 2. Description of step.

Solve the given equation to find the value of y as,

鈭�21=7鈭�4y鈬�鈭�21鈭�7=鈭�4y鈬�鈭�28=鈭�4y鈬�4y=28鈬�y=284鈬�y=7

03

Step 3. Check solution.

In order to check the solution, put the value of yback in the given equation and see if it satisfies the equation, i.e. of left hand side is equals to right hand side, as:

鈭�21=7鈭�4y鈬�鈭�21=7鈭�47鈬�鈭�21=7鈭�28鈬�鈭�21=鈭�21鈬�true

Hence, the solution y=7satisfies the equation.

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