Respuesta :

You would have to insert the number into the variable. For example,
[tex]3x - 27 = 18[/tex]
Then, you would isolate the x value (3x).
[tex] 3x = 18 + 27[/tex]
Simplify.
[tex] 3x = 45[/tex]
Finally, divide both sides by the coefficient.
[tex] \frac{ 45}{3} = \frac{3x}{3} [/tex]
You end up with
[tex] x = 15[/tex]
BiologiaMagister

Firstly, we substitute y by 27 to form this equation:

3x - 27 = 18

Equation step-by-step:

3x = -27 = 18 → we take -27 to the right side of the equation

3x = 18 + 27 → we solve for 18 + 27

3x = 45 → we take 3 to the right side of the equation

x = 45 / 3 → we solve for 45 / 3

x = 15 → final answer


Hope it helped,


BioTeacher101

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