Question

1)-3x=21 2)0,5x-1,5=0

Answer 1

Ответ:

1) -3*(-7)=21

2)0,5*3-1,5=0

Объяснение:

1) -3*(-7)=21  x= -7

2)0,5*3-1,5=0  x=3

Answer 2

Ответ:

1) х=-7; 2) х=3.

Объяснение:

1)-3х=21

-3х:(-3)=21:(-3)

х=-7

2)0,5х-1,5=0

0,5х=1,5

х=3

Answer 3

To solve the two equations, you can use basic algebraic techniques. Let's work on each equation separately:

1. -3x = 21

To isolate x, you need to divide both sides of the equation by -3:

-3x / -3 = 21 / -3

x = -7

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

2. 0.5x - 1.5 = 0

To isolate x in this equation, add 1.5 to both sides:

0.5x - 1.5 + 1.5 = 0 + 1.5

0.5x = 1.5

Now, divide both sides by 0.5 to solve for x:

(0.5x) / 0.5 = 1.5 / 0.5

x = 3

So, the solution to the second equation is x = 3.

Answer 4

To solve the two equations:

1. -3x = 21
2. 0.5x - 1.5 = 0

Let's start with the first equation:

1. -3x = 21

To isolate x, you can divide both sides of the equation by -3:

-3x / -3 = 21 / -3

x = -7

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

Now, let's move on to the second equation:

2. 0.5x - 1.5 = 0

First, add 1.5 to both sides to isolate the x term:

0.5x - 1.5 + 1.5 = 0 + 1.5

0.5x = 1.5

Now, divide both sides by 0.5 to solve for x:

(0.5x) / 0.5 = 1.5 / 0.5

x = 3

So, the solution to the second equation is x = 3.