Question

2х-15=13 7у-25=45 130-4х=70 49-3х=34 9у-89=55 74-8z=2

Answer 1

1) 2х-15=13

2х=13+15

2х=28

х=28/2

х=14

2) 7у-25=45

7у=45+25

7у=70

у=70/7

у=10

3) 130-4х=70

4х=130-70

4х=60

х=60/4

х=15

4) 49-3х=34

3х=49-34

3х=15

х=15/3

х=5

5) 9у-89=55

9у=55+89

9у=144

у=144/9

у=16

6) 74-8z=2

8z=74-2

8z=72

z=72/8

z=9

Answer 2

To solve each of these equations, follow these steps:

1. Isolate the variable on one side of the equation.
2. Perform the required operations to solve for the variable.

Let's go through each equation step by step:

1. 2x - 15 = 13 Add 15 to both sides to isolate the variable term: 2x = 13 + 15 2x = 28 Now, divide both sides by 2 to find the value of x: x = 28 / 2 x = 14

2. 7y - 25 = 45 Add 25 to both sides: 7y = 45 + 25 7y = 70 Now, divide both sides by 7 to find the value of y: y = 70 / 7 y = 10

3. 130 - 4x = 70 Subtract 130 from both sides: -4x = 70 - 130 -4x = -60 Now, divide both sides by -4 to find the value of x: x = -60 / -4 x = 15

4. 49 - 3x = 34 Subtract 49 from both sides: -3x = 34 - 49 -3x = -15 Now, divide both sides by -3 to find the value of x: x = -15 / -3 x = 5

5. 9y - 89 = 55 Add 89 to both sides: 9y = 55 + 89 9y = 144 Now, divide both sides by 9 to find the value of y: y = 144 / 9 y = 16

6. 74 - 8z = 2 Subtract 74 from both sides: -8z = 2 - 74 -8z = -72 Now, divide both sides by -8 to find the value of z: z = -72 / -8 z = 9

So, the solutions to the equations are: x = 14, y = 10, x = 15, x = 5, y = 16, and z = 9.