The solution of the equation is .

**Further explanation:**

**Given:**

The equation is .

**Calculation:**

**Method (1)**

The given equation is as follows:

The above equation is a **linear equation** that has **one** **degree**.

The equation with one variable can be solved by moving all terms in to the one side and simplify the equation for the value of variable.

Subtract on both sides in the equation (1) to obtain the value of as follows,

Now, multiply on both sides of the above equation as,

Therefore, the value of is .

**Method (2)**

To obtain the solution of the equation (1), take **least common multiple** of the denominator of the left hand side of the equation as,

Now, multiply by on both sides of the above equation to obtain the value of as follows,

Subtract on both sides of the above equation as follows,

Therefore, the value of is .

Thus, the solution of the equation is .

**Learn more:**

**1.** Learn more about equations brainly.com/question/1473992

**2.** A problem on line brainly.com/question/1575090

**3.** A problem on function brainly.com/question/1435353

**Answer details:**

**Grade:** Middle school

**Subject: **Mathematics

**Chapter:** Linear equations

**Keywords:** Equation, 13+(w/7)=-18, variables, subtract, linear equations, one degree, multiply least common multiple, linear equation, mathematics.