Question

Nisha did the work below to solve an equation. Step 1 7 b 3. 2 b minus 5 = 18. 92 Step 2 10. 2 b minus 5 = 18. 92 Step 3 5. 2 b = 18. 92 Step 4 b = 3. 64 In which step did Nisha make her first error? Step 1 Step 2 Step 3 Step 4.

Answer 1

Answer:

Step 3

Explanation:

Here, the given expression,

$7b+3.2b-5=18.92$

Since, when we solve the given expression the steps of solution are as follows,

Step 1 : 7b + 3.2b - 5 = 18.92

Step 2 : 10.2b - 5 = 18.92      ( Combining like terms in left side )

Step 3 : 10.2b = 23.92           ( Adding 5 on both sides )

Step 4 : b = 4.6                       ( Dividing both sides by 10.2 )

Hence, by the above explanation it is clear that she made her mistake in step 3 ( she did not add 5 on right side )