Question

Решите уравнение: 1) 1,1х-2,5=0,6х; 3)16-9,5у=3у+21; 5)0,5х-7=-2/3х ПОМОГИТЕ ПОЖАЛУЙСТА СРОЧНО

Answer 1

1)1,1 x-2,5=0,6x;
0,05x=2,5;
x=50;
2)16-9,5y=3y+21;
-12,5y=5;
y=-5/125=-0,04;
5)0,5x-7=-2/3x;
1,5x-21=-2x;
3,5x=21;
x=6;
Что бы решать такие уравнения, нужно знать несколько способов:
1)x переносим в левую сторону, а числа в правую, при переносе меняем знаки на противоположные и если не моде5шь посчитать дроби, тогда умножай на общий знаменатель

Answer 2

Уравнение 1: 1.1x - 2.5 = 0.6x

To solve the equation 1.1x - 2.5 = 0.6x, we can follow these steps:

1. Subtract 0.6x from both sides to isolate the variable x on one side of the equation. 2. Add 2.5 to both sides to further isolate x. 3. Solve for x.

Let's solve it step by step.

Step 1:

Subtract 0.6x from both sides: 1.1x - 0.6x - 2.5 = 0.6x - 0.6x 0.5x - 2.5 = 0

Step 2:

Add 2.5 to both sides: 0.5x - 2.5 + 2.5 = 0 + 2.5 0.5x = 2.5

Step 3:

Solve for x: x = 2.5 / 0.5 x = 5

So, the solution to the equation 1.1x - 2.5 = 0.6x is x = 5.

Уравнение 2: 16 - 9.5y = 3y + 21

To solve the equation 16 - 9.5y = 3y + 21, we can follow these steps:

1. Add 9.5y to both sides to isolate the variable y on one side of the equation. 2. Subtract 16 from both sides to further isolate y. 3. Solve for y.

Let's solve it step by step.

Step 1:

Add 9.5y to both sides: 16 - 9.5y + 9.5y = 3y + 21 + 9.5y 16 = 12.5y + 21

Step 2:

Subtract 16 from both sides: 16 - 16 = 12.5y + 21 - 16 0 = 12.5y + 5

Step 3:

Solve for y: 12.5y = -5 y = -5 / 12.5 y = -0.4

So, the solution to the equation 16 - 9.5y = 3y + 21 is y = -0.4.

Уравнение 3: 0.5x - 7 = -2/3x

To solve the equation 0.5x - 7 = -2/3x, we can follow these steps:

1. Add 2/3x to both sides to isolate the variable x on one side of the equation. 2. Add 7 to both sides to further isolate x. 3. Solve for x.

Let's solve it step by step.

Step 1:

Add 2/3x to both sides: 0.5x + 2/3x - 7 = -2/3x + 2/3x 0.5x + 2/3x - 7 = 0

Step 2:

Add 7 to both sides: 0.5x + 2/3x - 7 + 7 = 0 + 7 0.5x + 2/3x = 7

Step 3:

Combine the x terms: (0.5 * 3)x + (2 * 2)x = 7 * 3 1.5x + 4x = 21 5.5x = 21

Step 4:

Solve for x: x = 21 / 5.5 x = 3.8182

So, the solution to the equation 0.5x - 7 = -2/3x is x = 3.8182.