Question

А)2х>-7,2 б)одна вторая х+3 меньше или равно 2х-1

Answer 1

А) х>-3,6 х € (-3.6; + бесконечности)
Б) домножим неравенство на 2
x+6<=4x+2
x-4x<=2-6
-3x<=-4
x>=4/3
x€ [4/3; + бесконечности)

Answer 2

I can help you solve these inequalities. Here are the steps:

A) 2x > -7.2 - To find the solution set for this inequality, we need to isolate x on one side of the inequality sign. - We can do this by dividing both sides by 2, which is the coefficient of x. - This gives us x > -7.2 / 2, or x > -3.6 - The solution set is the set of all real numbers that are greater than -3.6 - We can write this in interval notation as (-3.6, +∞), or in set-builder notation as {x | x > -3.6}

B) (1/2)x + 3 ≤ 2x - 1 - To find the solution set for this inequality, we need to simplify the expression on both sides of the inequality sign and then isolate x on one side. - We can do this by subtracting (1/2)x from both sides, which gives us 3 ≤ (3/2)x - 1 - Then we can add 1 to both sides, which gives us 4 ≤ (3/2)x - Then we can divide both sides by (3/2), which gives us 8/3 ≤ x - The solution set is the set of all real numbers that are greater than or equal to 8/3 - We can write this in interval notation as [8/3, +∞), or in set-builder notation as {x | x ≥ 8/3}

I hope this helps you understand how to solve inequalities. If you need more help, you can use some online tools that can show you the steps and the graphs of the solutions, such as [Mathway](https://www.mathway.com/ru/Algebra), [Калькулятор Уравнений](https://www.kontrolnaya-rabota.ru/s/equal-one/), or [Symbolab](https://ru.symbolab.com/solver/equation-calculator).