Solve the equation. 2x - 3 + 4x = 21

Simplifying 2x + - 3 + 4x = 21

Reorder the terms: - 3 + 2x + 4x = 21

Combine like terms: 2x + 4x = 6x - 3 + 6x = 21

Solving - 3 + 6x = 21

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. - 3 + 3 + 6x = 21 + 3

Combine like terms: - 3 + 3 = 0 0 + 6x = 21 + 3 6x = 21 + 3

Combine like terms: 21 + 3 = 24 6x = 24

Divide each side by '6'.

x = 4

Add 3 to each side, then cross out the three. The equation can be rewritten as 2x+4x=24

2x plus 4x is 6x, making our equation 6x=24.

Divide by 6 on each side to get the answer x is 4. Your answer is 4