Question

1)8х+2=3х-182)2х-(1+9)=203) 7х-3×(2+1)=х+34) 4(у+2)=-2

Answer 1

1)8x+2=3x-18
8x-3x=-18-2
5x=-20
x=-4
Ответ:x=-4

2)2x-(1+9)=20
2x-1-9=20
2x=20+1+9
2x=30
x=15
Ответ:x=15

3)7x-3(2+1)=x+3
7x-6-3=x+3
7x-x=3+6+3
6x=12
x=2
Ответ:x=2

4)4(y+2)=-2
4y+8=-2
4y=-2-8
4y=-10
y=-2,5
Ответ:y=-2,5

Answer 2

1)8x-3x=18-2

5x=16

x=3,2

2)2x-10=20

2x=10+20

2x=30

x=15

3) 7x-3×3=x+3

7x-9=x+3

7x-x=3+9

6x=12

x=2

4)делим обе части уравнения на 2

2(у+2)=-1

2у+4=-1

2у=-1-4

2у=-5

у=-5/2(дробью перед ней знак минус)

Answer 3

To solve each of these equations, follow these steps:

1. 8x + 2 = 3x - 18

Step 1: Get all x terms on one side and the constants on the other side. Subtract 3x from both sides: 8x - 3x + 2 = 3x - 3x - 18 5x + 2 = -18

Step 2: Get the constant term on the other side. Subtract 2 from both sides: 5x = -18 - 2 5x = -20

Step 3: Solve for x by dividing both sides by 5: x = -20 / 5 x = -4

So the solution to the equation is x = -4.

2. 2x - (1 + 9) = 20

Step 1: Simplify the expression inside the parentheses: 2x - 10 = 20

Step 2: Get all x terms on one side and the constants on the other side. Add 10 to both sides: 2x - 10 + 10 = 20 + 10 2x = 30

Step 3: Solve for x by dividing both sides by 2: x = 30 / 2 x = 15

So the solution to the equation is x = 15.

3. 7x - 3(2 + 1) = x + 3

Step 1: Simplify the expression inside the parentheses: 7x - 3 * 3 = x + 3

Step 2: Get all x terms on one side and the constants on the other side. Subtract x from both sides: 7x - x - 9 = x - x + 3 6x - 9 = 3

Step 3: Get the constant term on the other side. Add 9 to both sides: 6x - 9 + 9 = 3 + 9 6x = 12

Step 4: Solve for x by dividing both sides by 6: x = 12 / 6 x = 2

So the solution to the equation is x = 2.

4. 4(y + 2) = -2

Step 1: Distribute the 4 on the left side: 4y + 8 = -2

Step 2: Get all y terms on one side and the constants on the other side. Subtract 8 from both sides: 4y + 8 - 8 = -2 - 8 4y = -10

Step 3: Solve for y by dividing both sides by 4: y = -10 / 4 y = -2.5

So the solution to the equation is y = -2.5.