Question

9х - 26= 30 -5х 3.6 + 5 y = 7 (1.2 - y)

Answer 1

Пошаговое объяснение:

9х - 26 = 30 - 5х

9х + 5х = 30 + 26

14х = 56

х = 56 : 14

х = 4

3,6 + 5у = 7(1,2 - у)

3,6 + 5у = 8,4 - 7у

5у + 7у = 8,4 - 3,6

12у = 4,8

у = 4,8 : 12

у = 0,4

Answer 2

Let's solve each equation separately:

1. 9x - 26 = 30 - 5x

First, let's isolate the variables on one side of the equation:

Add 5x to both sides:

9x + 5x - 26 = 30

Combine like terms:

14x - 26 = 30

Now, add 26 to both sides to isolate the variable:

14x - 26 + 26 = 30 + 26

14x = 56

Finally, divide both sides by 14 to solve for x:

14x/14 = 56/14

x = 4

So, the solution to the first equation is x = 4.

2. 3.6 + 5y = 7(1.2 - y)

First, let's simplify the right side of the equation by multiplying 7 by 1.2:

7(1.2 - y) = 8.4 - 7y

Now, the equation becomes:

3.6 + 5y = 8.4 - 7y

Next, let's isolate the variables on one side of the equation. Add 7y to both sides:

3.6 + 5y + 7y = 8.4 - 7y + 7y

Combine like terms:

12y + 3.6 = 8.4

Now, subtract 3.6 from both sides to isolate the variable:

12y + 3.6 - 3.6 = 8.4 - 3.6

12y = 4.8

Finally, divide both sides by 12 to solve for y:

12y/12 = 4.8/12

y = 0.4

So, the solution to the second equation is y = 0.4.

To summarize:

1. x = 4
2. y = 0.4