Question

0.3*x-3-0.5*6x-9=4.2-3.3​

Answer 1

Ответ:

0.3х-3-3х-9=0.9

-2.7х-12=0.9

-2.7х=0.9+12

-2.7х=12.9

-27х= 129

х= - 129/27=43/9=4 7/9

Answer 2

To solve the equation 0.3x - 3 - 0.5(6x - 9) = 4.2 - 3.3, you can follow these steps:

1. First, distribute the -0.5 to both terms inside the parentheses on the left side of the equation:

0.3x - 3 - 0.5 * 6x + 0.5 * 9 = 4.2 - 3.3

2. Now, simplify each side of the equation separately:

On the left side: 0.3x - 3 - 3x + 4.5 = 4.2 - 3.3

3. Combine like terms on both sides:

-2.7x + 1.5 = 0.9

4. Next, isolate the variable x by moving the constant term 1.5 to the right side of the equation by subtracting it from both sides:

-2.7x = 0.9 - 1.5

-2.7x = -0.6

5. Finally, divide both sides by -2.7 to solve for x:

x = (-0.6) / (-2.7)

x ≈ 0.2222 (rounded to four decimal places)

So, the solution to the equation is approximately x ≈ 0.2222.