Question

What’s is this one ????

Answer 1

`\begin{array}{lll}1.&x+12.7=-25.5&\text{given}\\2.&x+12.7-12.7=-25.2-12.7& \text{subtraction property of equality}\\3.&x+0=-37.9&\text{additive inverse/simplification}\\4.&x=-37.9&\text{identity property of addition}\end{array}`

Explanation:

Solve the equation
`x+12.7=-25.2`

1.
`x+12.7=-25.2` - given

2. Subtract 12.7 from both sides:

`x+12.7-12.7=-25.2-12.7` - subtraction property of equality

3. Since
`12.7-12.7=0` and
`-25.2-12.7=-37.9,` we have

`x+0=-37.9` - additive inverse/simplification

4. Since
`x+0=x,` we have

`x=-37.9` - identity property of addition.