Question

After substituting, what is the first step when evaluating x+3x-4.2 when w=5?

Answer 1

Multiply 3*5 then you add 5 to 15 which is 20. Then Subtract 20 - 4.2= 15.8

Answer 2

After substituting the first step is to open the bracket of middle term

Explanation:

Given the equation

`x+3x-4.2`

when x=5, we have to determine the first step after substitution.

`5+3(5)-4.2`

The first step is to open the bracket of middle term

`5+15-4.2`

Then next step is to adding first two terms by BODMAS rule

`20-4.2`

Now subtraction, we get 15.8