Question

21-х/10-5х-1/12+3(х-1)/4=4 СРОООЧНО!

Answer 1

$21 - \frac{x}{10} - 5x-\frac{1}{12}+\frac{3*(x-1)}{4}=4 \\21-\frac{x}{5*2} - 5x - \frac{1}{2*2*3}+\frac{3*(x-1)}{2*2}=4\\\frac{1260-6x-300x-5+45(x-1)}{60}=4\\1255-306x+45x-45=240\\1210-261x=240\\261x=970\\x=\frac{970}{261}$

Answer 2

To solve the equation, we need to find the value of x that satisfies the equation:

21x/10 - 5x - 1/12 + 3(x-1)/4 = 4

To make it easier to work with, let's first clear the fractions by multiplying the entire equation by the least common multiple (LCM) of the denominators, which is 60.

60 * (21x/10) - 60 * (5x) - 60 * (1/12) + 60 * (3(x-1)/4) = 60 * 4

Simplifying:

12x - 300 - 5 + 15(x-1) = 240

Now, distribute the 15 on the left side:

12x - 300 - 5 + 15x - 15 = 240

Combine like terms:

27x - 320 = 240

Now, isolate the variable by moving constants to the other side:

27x = 240 + 320 27x = 560

Finally, divide both sides by 27 to find the value of x:

x = 560 / 27 x ≈ 20.74

So, the solution to the equation is approximately x = 20.74.