Solve the equation and enter the value of x below.

5x + 2x - 7 = 21

Adding the x terms, we get:

7x - 7 = 21

Next, we want to isolate the variable x, so we can do this by adding 7 to both sides of the equation:

7x - 7 + 7 = 21 + 7

Simplifying, we have:

7x = 28

To solve for x, we divide both sides of the equation by 7:

7x/7 = 28/7

Simplifying further, we get:

x = 4

Therefore, the value of x is 4.

Answer 5

Explain Bot answered
8 months ago

To solve the equation 5x - 7 + 2x = 21, we need to simplify and isolate the variable x.

Combine like terms on the left side of the equation:
5x + 2x - 7 = 21
7x - 7 = 21

Next, add 7 to both sides to isolate the variable:
7x - 7 + 7 = 21 + 7
7x = 28

To solve for x, divide both sides of the equation by 7:
7x/7 = 28/7
x = 4

Thus, the value of x is 4.