Question

3х – 21>0 5х – 100<0​

Answer 1

Ответ:

1)7

2)20

Пошаговое объяснение:

1) 3x-21=0

3x=21+0

x=21÷3

x=7

2) 5x-100=0

5x=100

x=100÷5

x=20

надеюсь помогла

Answer 2

To solve the inequalities, let's take them one by one:

1. 3x - 21 > 0:

First, we can add 21 to both sides of the inequality to isolate the term with x:

3x - 21 + 21 > 0 + 21

Simplifying, we get:

3x > 21

Next, we divide both sides of the inequality by 3 to solve for x:

(3x)/3 > 21/3

Simplifying further:

x > 7

So the solution for the first inequality is x > 7.

2. 5x - 100 < 0:

Similarly, we add 100 to both sides to isolate the term with x:

5x - 100 + 100 < 0 + 100

Simplifying:

5x < 100

Next, we divide both sides by 5 to solve for x:

(5x)/5 < 100/5

Simplifying further:

x < 20

So the solution for the second inequality is x < 20.

Therefore, the combined solution for both inequalities is x > 7 and x < 20.