Question

What’s is this one ????

Answer 1

Answer:

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

Step-by-step 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.