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Chapter 2: Q. 2.61 (page 134)

Solve the formula 4x+7y=9fory.

Short Answer

Expert verified

The solution foryisy=9-4x7.

Step by step solution

01

Step 1. Given information

The given formula is4x+7y=9

02

Step 2. Isolate y on one side of the formula.

Subtract 4xfrom both sides to isolate the term with yand simplify as shown below:

4x+7y=94x-4x+7y=9-4x7y=9-4x

03

Step 3. Make coefficient of y as 1.

Divide by 7 on both sides to make coefficient of yas 1 as shown below:

7y=9-4x7y7=9-4x7y=9-4x7

04

Step 4. Final answer

The given formula 4x+7y=9is solved for yand the solution isy=9-4x7.

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