Question

1)5x+4-2x=25 2)5,6-(3,4-x)=1,4 3)5x-12=18

Answer 1

Ответ:

1)х=7

2)х=-0.8

3)х=6

Пошаговое объяснение:

1)3х=21

х=7

2)5.6-3.4+х=1.4

х=1.4-5.6+3.4

х=-0.8

3)5х=30

х=6

Answer 2

1) 5x - 2x = 25 - 4
3x = 21
x = 21:3
x = 7

2) 5,6 - 3,4 + x = 1,4
x = 1,4 - 5,6 + 3,4
x = -0,8

3) 5x = 18 + 12
5x = 30
x = 30:5
x = 6

Answer 3

Let's solve each of the equations step-by-step:

1. 5x + 4 - 2x = 25

Combine like terms on the left side of the equation: 3x + 4 = 25

Now, isolate the variable x by moving the constant term to the other side: 3x = 25 - 4 3x = 21

Finally, divide both sides by the coefficient of x to find the value of x: x = 21 / 3 x = 7

So, the solution to the equation is x = 7.

2. 5,6 - (3,4 - x) = 1,4

First, simplify the expression inside the parentheses: 5,6 - 3,4 + x = 1,4

Next, isolate x by moving the constant terms to the other side: x = 1,4 - 5,6 + 3,4

Now, perform the arithmetic: x = -1,2 + 3,4 x = 2,2

So, the solution to the equation is x = 2,2.

Please note that in standard mathematical notation, we use a period (.) as the decimal separator, but you used a comma (,). The result would be 2.2 instead of 2,2.

3. 5x - 12 = 18

Add 12 to both sides of the equation to isolate the variable term: 5x = 18 + 12 5x = 30

Now, divide both sides by the coefficient of x to find the value of x: x = 30 / 5 x = 6

So, the solution to the equation is x = 6.