Question

1) 1,5+2,5x=142) (x-1,1)-2=53) 10-0,3x=6,44) x:100-20=7,2решите уравнение ​

Answer 1

Ответ:

1) 1,5+2,5x=14

2,5x=14-1,5

2,5x=12,5

x=12,5:2,5

x=5

2) (x-1,1)-2=5

x-1,1=5+2

x-1,1=7

x=7+1,1

x=8,1

3) 10-0,3x=6,4

-0,3x=6,4-10

-0,3x= -3,6

x= -3,6:-0,3

x=12

4) x:100-20=7,2

x:100=7,2+20

x:100=27,2

x=27,2×100

x=2720

Удачи!

Answer 2

To solve the equations, we'll follow the steps for each one:

1. 1.5 + 2.5x = 14

Step 1: Move the constant term (1.5) to the other side of the equation. 1.5 + 2.5x - 1.5 = 14 - 1.5 2.5x = 12.5

Step 2: Divide both sides by the coefficient of x (2.5) to isolate x. x = 12.5 / 2.5 x = 5

So, the solution for this equation is x = 5.

2. (x - 1.1) - 2 = 5

Step 1: Combine like terms on the left side of the equation. x - 1.1 - 2 = 5

Step 2: Move the constant terms (-1.1 and -2) to the right side of the equation. x = 5 + 1.1 + 2 x = 8.1

So, the solution for this equation is x = 8.1.

3. 10 - 0.3x = 6.4

Step 1: Move the constant term (10) to the other side of the equation. 10 - 0.3x - 10 = 6.4 - 10 -0.3x = -3.6

Step 2: Divide both sides by the coefficient of x (-0.3) to isolate x. x = -3.6 / -0.3 x = 12

So, the solution for this equation is x = 12.

4. x / 100 - 20 = 7.2

Step 1: Move the constant term (-20) to the other side of the equation. x / 100 = 7.2 + 20

Step 2: Combine the constant terms (7.2 and 20). x / 100 = 27.2

Step 3: Multiply both sides by 100 to isolate x. x = 27.2 * 100 x = 2720

So, the solution for this equation is x = 2720.