Question

21/31-(Х+7/31)=8/31 43*Х-18=2390

Answer 1

Ответ:

21/31-(Х+7/31)=8/31

х=6/31

43Х-18=2390

х=56

Пошаговое объяснение:

21/31-(Х+7/31)=8/31

21/31-х-7/31=8/31

14/31-х=8/31

-х=8/31-14/31

-х=-6/31

х=6/31

43*Х-18=2390

43х=2390+18

43х=2408

х=2408:43

х=56

Answer 2

To solve the equations, let's start with the first equation:

21/31 - (x + 7/31) = 8/31

To simplify the equation, let's combine the fractions on the left side:

(21 - (x + 7))/31 = 8/31

Now, let's simplify further by combining like terms:

(21 - x - 7)/31 = 8/31

Simplifying the numerator:

(14 - x)/31 = 8/31

To eliminate the fractions, we can multiply both sides of the equation by 31:

31 * (14 - x)/31 = 8/31 * 31

Simplifying:

14 - x = 8

Now, let's solve for x by isolating it on one side:

14 - x = 8

Subtracting 14 from both sides:

14 - 14 - x = 8 - 14

Simplifying:

-x = -6

To solve for x, we multiply both sides by -1:

(-1)(-x) = (-1)(-6)

Simplifying:

x = 6

So the solution to the first equation is x = 6.

Moving on to the second equation:

43x - 18 = 2390

To isolate x, let's add 18 to both sides:

43x - 18 + 18 = 2390 + 18

Simplifying:

43x = 2408

To solve for x, divide both sides by 43:

(1/43)(43x) = (1/43)(2408)

Simplifying:

x = 56

Therefore, the solution to the second equation is x = 56.

To summarize, the solutions to the given equations are: First equation: x = 6 Second equation: x = 56