Question

-2.1a + 7.3 = 1.4a - 10.2

Answer 1

Explanation:

-2.1a+7.3=1.4a-10.2

7.3=3.5a-10.2

17.5=3.5a

a=5

Answer 2

The given equation is:

`-2.1a+7.3=1.4a-10.2`

Step by step solution:

1. Add 10.2 to both sides:

`\begin{gathered} -2.1a+7.3+10.2=1.4a-10.2+10.2 \\ -2.1a+17.5=1.4a \end{gathered}`

2. Add 2.1a to both sides:

`\begin{gathered} -2.1a+17.5+2.1a=1.4a+2.1a \\ 17.5=3.5a \end{gathered}`

3. Divide both sides by 3.5

`\begin{gathered} (17.5)/(3.5)=(3.5a)/(3.5) \\ \text{Simplify} \\ 5=a \end{gathered}`

Then a=5