21

22

23

5x + 35°

25

26

45°

28

Which of the following is the value of x?

Answer: x = 4

Step-by-step explaintion : 2x - 10 = 10 - 3x

Simplifying

2x + - 10 = 10 + - 3x

Reorder the terms:

-10 + 2x = 10 + - 3x

Solving

-10 + 2x = 10 + - 3x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '3x' to each side of the equation.

-10 + 2x + 3x = 10 + - 3x + 3x

Combine like terms: 2x + 3x = 5x

-10 + 5x = 10 + - 3x + 3x

Combine like terms: - 3x + 3x = 0

-10 + 5x = 10 + 0

-10 + 5x = 10

Add '10' to each side of the equation.

-10 + 10 + 5x = 10 + 10

Combine like terms: - 10 + 10 = 0

0 + 5x = 10 + 10

5x = 10 + 10

Combine like terms: 10 + 10 = 20

5x = 20

Divide each side by '5'.

x = 4

Simplifying

x = 4