Question

................................. 3х+21=39х

Answer 1

3x + 21 = 39x
3x - 39x = -21
-36x = -21
x = 7/12

Answer 2

$3x+21=39x \\ 21=39x-3x \\ 21=36x \\ x=\frac{21}{36}=\frac{7\cdot 3}{12 \cdot 3} = \frac{7}{12}$

Answer 3

To solve the equation, we need to isolate the variable "x" on one side of the equation. Here's the step-by-step solution:

1. Subtract 3x from both sides of the equation to move all the x terms to one side: 3x + 21 - 3x = 39x - 3x

Simplifying the equation: 21 = 36x

2. Now, we want to get "x" alone on one side of the equation. Since 36 is multiplied by "x," we need to divide both sides by 36: 21 / 36 = 36x / 36

Simplifying the equation: 7/12 = x

So, the solution to the equation is: x = 7/12