Question

: a) 21x-21 = 2; b) 1213x - 5] =-20.[4]​

Answer 1

Ответ:

21x-21 = 2

21х=2+21

21х=23

х=23/21

х=1ц 2/21

Пошаговое объяснение:

второй пример запиши правильно

Answer 2

It appears that you've provided two equations, but there are some formatting issues. I'll do my best to interpret and solve them for you.

a) 21x - 21 = 2: To solve for x in this equation, you can isolate x on one side by adding 21 to both sides of the equation:

21x - 21 + 21 = 2 + 21

This simplifies to:

21x = 23

Now, to solve for x, divide both sides by 21:

21x / 21 = 23 / 21

x = 23 / 21

x simplifies to:

x ≈ 1.0952

b) 1213x - 5] = -20.[4]: It looks like there is a formatting issue with this equation. The closing square bracket (]) appears to be in the wrong place. Assuming you meant:

1213x - 5 = -20.4

To solve for x in this equation, you can isolate x on one side by adding 5 to both sides of the equation:

1213x - 5 + 5 = -20.4 + 5

This simplifies to:

1213x = -15.4

Now, to solve for x, divide both sides by 1213:

1213x / 1213 = -15.4 / 1213

x = -15.4 / 1213

x ≈ -0.0127

So, the solutions to the equations are approximately:

a) x ≈ 1.0952 b) x ≈ -0.0127