Solve the equation: 2x - 3 + 4x = 21
x = -12, x = -6, x = 4, x = 6

Solution:

Given the equation 2x - 3 + 4x = 21

Isolate the variables and solve the equation.

2x - 3 + 4x = 21 ⇒ 2x + 4x = 21 + 3

⇒ 6x = 24

⇒ x = 24/6

⇒ x = 4

Solve the equation: 2x - 3 + 4x = 21

Summary:

By solving 2x - 3 + 4x = 21, we get x = 4.