Question

Помогите пожайлуста решить уравнения: 1) 3x = 28-x 2) 5x+12 = 8x+30 3) 33+8x = -5x+72 4) 6x-19 = -x-10 5) 0.7-0.2x = 0.3x-1.8 6) 0.1x+9 = 0.2x-4 Заранее спасибо

Answer 1

1) 3x = 28-x
4x=28
x=7
2) 5x+12 = 8x+30
-3x=18
x=-6
3) 33+8x = -5x+72
13x=39
x=3
4) 6x-19 = -x-10
7x=9
x=9/7
5) 0.7-0.2x = 0.3x-1.8
-0,5x=-2,5
x=5
6) 0.1x+9 = 0.2x-4 
-0,1x=-13
x=130

Answer 2

Solving Equations:

Sure, I can help you solve these equations. Let's go through each one step by step:

1) 3x = 28 - x To solve for x, we can combine like terms by adding x to both sides of the equation: 3x + x = 28 - x + x Simplifying, we get: 4x = 28 Now, divide both sides of the equation by 4 to isolate x: 4x/4 = 28/4 The solution is: x = 7 [[1]]

2) 5x + 12 = 8x + 30 To solve for x, we can start by moving all the x terms to one side and the constant terms to the other side: 5x - 8x = 30 - 12 Simplifying, we get: -3x = 18 Now, divide both sides of the equation by -3 to isolate x: -3x/-3 = 18/-3 The solution is: x = -6 [[2]]

3) 33 + 8x = -5x + 72 To solve for x, we can start by moving all the x terms to one side and the constant terms to the other side: 8x + 5x = 72 - 33 Simplifying, we get: 13x = 39 Now, divide both sides of the equation by 13 to isolate x: 13x/13 = 39/13 The solution is: x = 3 [[3]]

4) 6x - 19 = -x - 10 To solve for x, we can start by moving all the x terms to one side and the constant terms to the other side: 6x + x = -10 + 19 Simplifying, we get: 7x = 9 Now, divide both sides of the equation by 7 to isolate x: 7x/7 = 9/7 The solution is: x = 9/7 or approximately 1.29 [[4]]

5) 0.7 - 0.2x = 0.3x - 1.8 To solve for x, we can start by moving all the x terms to one side and the constant terms to the other side: 0.2x - 0.3x = 0.7 - 1.8 Simplifying, we get: -0.1x = -1.1 Now, divide both sides of the equation by -0.1 to isolate x: -0.1x/-0.1 = -1.1/-0.1 The solution is: x = 11 [[5]]

6) 0.1x + 9 = 0.2x - 4 To solve for x, we can start by moving all the x terms to one side and the constant terms to the other side: 0.1x - 0.2x = -4 - 9 Simplifying, we get: -0.1x = -13 Now, divide both sides of the equation by -0.1 to isolate x: -0.1x/-0.1 = -13/-0.1 The solution is: x = 130 [[6]]

I hope this helps! Let me know if you have any further questions.