Question

2×-15=13 130-4×=70 49-3×=34 9y-89=55 74-8z=2

Answer 1

1. 2x-15=13

2x=13+15

2x=28

x=28/2

x=14

2.130-4x=70

4x=130-70

4x=60

x=60/4

x=15

3.49-3x=34

3x=49-34

3x=15

x=15/3

x=5

4.9y-89=55

9y=55+89

9y=144

y=144/9

y=16

5.74-8z=2

8z=74-2

8z=72

z=72/8

z=9

Answer 2

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

1. 2×(-15) = 13

To solve for x, divide both sides by 2: x = 13 / 2 x = 6.5

2. 130 - 4× = 70

To solve for x, first, subtract 130 from both sides: -4x = 70 - 130 -4x = -60

Now, divide both sides by -4: x = -60 / -4 x = 15

3. 49 - 3× = 34

To solve for x, first, subtract 49 from both sides: -3x = 34 - 49 -3x = -15

Now, divide both sides by -3: x = -15 / -3 x = 5

4. 9y - 89 = 55

To solve for y, first, add 89 to both sides: 9y = 55 + 89 9y = 144

Now, divide both sides by 9: y = 144 / 9 y = 16

5. 74 - 8z = 2

To solve for z, first, subtract 74 from both sides: -8z = 2 - 74 -8z = -72

Now, divide both sides by -8: z = -72 / -8 z = 9

So, the solutions to the equations are:

1. x = 6.5
2. x = 15
3. x = 5
4. y = 16
5. z = 9