x__=3x7+(___x7)

To evaluate the expression, we need to determine the value of the blank space represented by (___x7).

Since the expression is x__ = 3x7 + (___x7), we can simplify it by combining like terms:

x__ = 21 + (___x7)

As we don't have any further information about (___x7), we cannot determine its value.

To solve the equation x__ = 3x7 + (___x7), we need to determine the values of the blank spaces.

Let's break down the equation step-by-step:

x__ = 3x7 + (___x7)

First, we simplify the expression on the right-hand side of the equation:

3x7 + (___x7)

This means multiplying 3 by 7:

21 + (___x7)

Next, we evaluate the expression with the blank space:

21 + (___x7)

To determine the value inside the parentheses, we need more information. Please provide additional context or specific instructions for solving the equation.

To solve this equation, we need to fill in the missing numbers indicated by the underscore (_) symbols. Let's break down the given equation step by step:

First, we have x__ = 3x7 + (___x7)

To find the missing numbers, we can use algebraic properties and simplify the equation.

1. Starting with the right side of the equation, we have 3x7. This simplifies to 21.

2. Now, we need to determine the missing value in (___x7). Let's represent the missing number as "a" instead of using an underscore.

So, we have (a x 7).

Now, we can rewrite the equation as:

x__ = 21 + (a x 7)

We have one more unknown in our equation - the missing value represented by x__. Let's represent it as "b".

So, the equation becomes:

b = 21 + (a x 7)

Our goal is to determine the values of "a" and "b" to solve the equation.

Without additional information, we cannot determine the specific values for "a" and "b". They can be any real numbers that satisfy the equation.

So, the solution to the equation x__ = 3x7 + (___x7) is b = 21 + (a x 7), where "a" and "b" can be any real numbers.