Question

-15x≥-39 ; 14>7x ;64<-8x; 2x-3>7x-5 помогите пожалуйста с этими примерами

Answer 1

-15x ≥ -39
х ≤ -39 : (-15)
х ≤ 2,6

14 > 7x
x < 14 : 7
х < 2

64 < -8x
x < 64 : (-8)
x < -8

2x - 3 > 7x - 5
2x - 7x > 3 - 5
-5x > -2
x < -2 : (-5)
x < 0,4

Answer 2

Решение внизу на фото

Answer 3

1. -15x ≥ -39 To solve for x, we can start by dividing both sides by -15, but we have to flip the inequality sign since we are dividing by a negative number: x ≤ 39/15

So the solution is x ≤ 2.6 or x ∈ (-∞, 2.6].

2. 14 > 7x To solve for x, we can divide both sides by 7: 2 > x

So the solution is x < 2 or x ∈ (-∞, 2).

3. 64 < -8x To solve for x, we can divide both sides by -8, but we have to flip the inequality sign again: x < -8

So the solution is x < -8 or x ∈ (-∞, -8).

4. 2x - 3 > 7x - 5 To solve for x, we can start by simplifying the equation: -5 + 3 < 7x - 2x -2 < 5x -2/5 < x

So the solution is x > -2/5 or x ∈ (-2/5, ∞).