Question

Решите уравнения: а) 7x + 4,8= -6,4 б)2 2/11*(1/3x - 1/15)= -2,4

Answer 1

А) 7х=-6,4-4,8
   7х=-11,2
х=-1,6
б)2(1/3х-1/15)=-24/10
2/3х-2/15=-12/5
15*2/3х-15*2/15=-15*12/5
5*2х-2=-3*12
10х-2=-36
10х=-36+2
10х=-34
х= -3,4

Answer 2

I can help you solve the equations. Here is the detailed solution:

a) 7x + 4.8 = -6.4 To find x, we need to isolate it on one side of the equation. We can do this by subtracting 4.8 from both sides and then dividing by 7. This gives us:

7x + 4.8 - 4.8 = -6.4 - 4.8 7x = -11.2 x = -11.2 / 7 x = -1.6

b) 2 + 2/11 * (1/3x - 1/15) = -2.4 To find x, we need to simplify the expression on the left side of the equation and then isolate x on one side. We can do this by multiplying both sides by the common denominator of 11 * 15 and then expanding the brackets. This gives us:

11 * 15 * (2 + 2/11 * (1/3x - 1/15)) = 11 * 15 * (-2.4) 330 + 30 * (1/3x - 1/15) = -3960 330 + 10x - 2 = -3960 10x = -3960 - 330 + 2 10x = -4288 x = -428.8 / 10 x = -42.88

I hope this helps you understand how to solve the equations. You can also check the web search results for more examples and explanations .