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Chapter 9: Q. 9.164 (page 1101)

Try It.

Solve: 7y+1=2y鈭�5

Short Answer

Expert verified

Ans:7y+1=2y鈭�5鈬�y=-65(Decimal:y=-1.2)

Step by step solution

01

Step 1. Given information.

given expression: 7y+1=2y鈭�5

02

Step 2. Square both sides of the equation. 

(7y+1)2=(2y鈭�5)2鈬�7y+1=2y-5

03

Step 3. Simplify, then the new equation. 

7y+1=2y-5鈬�5y=-6鈬�y=-65=-1.2

Therefore, the value ofy=-65or-1.2

04

Check the answer.

7y+1=2y鈭�5鈬�7脳-1.2+1=2脳-1.2鈭�5鈬�-7.4=-7.4

The solution islocalid="1647893287374" y=-65=-1.2

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