Question

N224a) 7×=68b) 5x+6=51c) 3x-2 1=33-2x.​

Answer 1

Ответ:

Пошаговое объяснение:

а) 7х=68

х=68:7

х=9 5\7

корнем уравнения 9 не является

b) 5х+6=51

5х=51-6

5х=45

х=45:5

х=9

корнем уравнения является 9

с) 3х-21=33-2х

3х+2х=33+21

5х=54

х=54:5

х= 10 4\5

корнем уравнения не является 9

Answer 2

To solve each of the equations, we need to find the value of the variable "x." Let's solve them one by one:

a) 7x = 68

To solve for x, divide both sides of the equation by 7: 7x / 7 = 68 / 7 x = 68 / 7 x ≈ 9.71

b) 5x + 6 = 51

To solve for x, first, isolate the term with x by subtracting 6 from both sides: 5x + 6 - 6 = 51 - 6 5x = 45

Now, divide both sides of the equation by 5 to solve for x: 5x / 5 = 45 / 5 x = 9

c) 3x - 2(1) = 33 - 2x

To solve for x, first, perform the operation within the parentheses: 3x - 2 = 33 - 2x

Next, let's get all the x terms on one side by adding 2x to both sides of the equation: 3x + 2x - 2 = 33

Combine the x terms on the left side: 5x - 2 = 33

Now, isolate the x term by adding 2 to both sides of the equation: 5x - 2 + 2 = 33 + 2 5x = 35

Finally, divide both sides by 5 to find the value of x: 5x / 5 = 35 / 5 x = 7

So, the solutions for the given equations are: a) x ≈ 9.71 b) x = 9 c) x = 7