Chapter 4.1, Problem 80E

To determine

To write given equation in numeric form and solve the equation.

Answer to Problem 80E

  $x=-1$

Explanation of Solution

Given Information: two times the sum of 3 and a number is equal to 5 plus the number

Formula used: Simple Algebra basics.

Calculation:

Let the number be x

So given 2 times the sum of 3 and that number, which gives - 2(x+3)

The above number is now equal to 5 plus the number- 5+x

So, the equation is-

  $\begin{array}{l}2(3+x)=5+x\\ 6+2x=5+x\\ 2x=5+x-6\\ 2x=x-1\\ 2x-x=-1\\ x=-1\end{array}$