Question

3х-17=8х+18 2(х+3)=12 0,8у+1,2=0,4у-2,8

Answer 1

Ответ:

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Пошаговое объяснение:

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Answer 2

Let's solve each of these equations step by step:

1. 3x - 17 = 8x + 18

First, let's isolate the x variable on one side of the equation. We can do this by subtracting 3x from both sides and adding 17 to both sides:

3x - 8x = 18 + 17

-5x = 35

Now, divide both sides by -5 to find the value of x:

x = 35 / -5 x = -7

So, the solution to the first equation is x = -7.

2. 2(x + 3) = 12

First, distribute the 2 on the left side of the equation:

2x + 6 = 12

Now, subtract 6 from both sides to isolate the 2x term:

2x = 12 - 6 2x = 6

Finally, divide both sides by 2 to find the value of x:

x = 6 / 2 x = 3

So, the solution to the second equation is x = 3.

3. 0.8y + 1.2 = 0.4y - 2.8

First, let's isolate the y variable on one side of the equation. Start by subtracting 0.4y from both sides:

0.8y - 0.4y + 1.2 = -2.8

Now, simplify the left side by combining like terms:

0.4y + 1.2 = -2.8

Next, subtract 1.2 from both sides:

0.4y = -2.8 - 1.2 0.4y = -4

Finally, divide both sides by 0.4 to find the value of y:

y = -4 / 0.4 y = -10

So, the solution to the third equation is y = -10.