Question

2) - х = 36 3) 15 + 3х=0 4) 6х+х+14=0 5) х – 1 = х – 5 6) 2х-(5+х) = 4 7) 5 – 2 (3-х) = 11

Answer 1

Ответ:

2.x= -36

3.3x=-15 x= -5

4.17x+4=0 7x=-14 x=-2

5. утверждение ложно

6.2(x-2(5+x))=2(x-10-2x)= 2(-x-10)

7. 5-6+2x=11 -1+2x =11 2x=11+1 2x=12 x=6

Answer 2

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

1. -x = 36 To solve for x, you can multiply both sides of the equation by -1 to isolate x: -x = 36 Multiply by -1: x = -36

2. 15 + 3x = 0 To solve for x, subtract 15 from both sides of the equation: 15 + 3x - 15 = 0 - 15 3x = -15 Now, divide both sides by 3 to isolate x: 3x/3 = -15/3 x = -5

3. 6x + x + 14 = 0 Combine like terms on the left side of the equation: 7x + 14 = 0 Subtract 14 from both sides: 7x = -14 Now, divide both sides by 7 to isolate x: 7x/7 = -14/7 x = -2

4. x - 1 = x - 5 To solve for x, subtract x from both sides of the equation: x - x - 1 = x - x - 5 -1 = -5 This equation has no solution. The variables cancel out, and you are left with a false statement.

5. 2x - (5 + x) = 4 First, simplify the expression inside the parentheses: 2x - 5 - x = 4 Combine like terms on the left side: x - 5 = 4 Now, add 5 to both sides to isolate x: x - 5 + 5 = 4 + 5 x = 9

6. 5 - 2(3 - x) = 11 First, distribute the -2 on the left side of the equation: 5 - 2*3 + 2x = 11 Now, simplify: 5 - 6 + 2x = 11 Combine like terms: -1 + 2x = 11 Add 1 to both sides to isolate 2x: -1 + 1 + 2x = 11 + 1 2x = 12 Now, divide both sides by 2 to find x: 2x/2 = 12/2 x = 6

So, the solutions are:

1. x = -36
2. x = -5
3. x = -2
4. No solution
5. x = 9
6. x = 6