Question

2х-16=-5х-30 ??? 8,5-2,15х=3,05х-9,5 ???

Answer 1

2 - 16 = -5 - 30

2 + 5 = 16 - 30

7 = - 14

= -14 ÷ 7

= - 2

8,5 - 2,15 = 3,05 - 9,5

-2,15 - 3,05 = -9,5 - 8,5

-5,2 = -18

= -18 ÷ (-5,2)

= -180 ÷ (-52)

= $3\frac{6}{13}$

Answer 2

To solve these equations, you can follow these steps:

1. Solve the first equation: 2x - 16 = -5x - 30

   First, add 5x to both sides to get the variable terms on one side: 2x + 5x - 16 = -30

   Combine like terms: 7x - 16 = -30

   Next, add 16 to both sides to isolate the variable term: 7x - 16 + 16 = -30 + 16

   Simplify: 7x = -14

   Finally, divide both sides by 7 to solve for x: 7x / 7 = -14 / 7 x = -2

2. Solve the second equation: 8.5 - 2.15x = 3.05x - 9.5

   First, add 9.5 to both sides to get the variable terms on one side: 8.5 - 2.15x + 9.5 = 3.05x - 9.5 + 9.5

   Simplify: 18 - 2.15x = 3.05x

   Next, add 2.15x to both sides to isolate the variable term: 18 - 2.15x + 2.15x = 3.05x + 2.15x

   Simplify: 18 = 5.2x

   Now, divide both sides by 5.2 to solve for x: 18 / 5.2 ≈ 3.46

So, the solutions to the equations are:

1. x = -2
2. x ≈ 3.46