Question

Розв’яжіть рівняння: а) 178 – (23 – x) =111. б) 21x – 7x = 510; в) (556+4х):18=56

Answer 1

Ответ:

а) x=-44 ; б) x= $36\frac{3}{7}$ ; в) x=113

Пошаговое объяснение:

a)178 – (23 – x) =111

178-23+x=111

155+x=111

x=111-155

x=-44

б)21x – 7x = 510

14x=510

x=$\frac{255}{7}$ / $36\frac{3}{7}$

в) (556+4х):18=56

$\frac{556+4x}{18} =56$

$\frac{(278+2x)}{18} =56$ (!!Только перед (278....)Поставь 2!!)

$\frac{278+2x}{9} = 56$

278+2x=504

2x=504-278

2x=226

x=113

(ЕСЛИ НЕ ТРУДНО ПОСТАВЬТЕ ПОЖАЛУЙСТА ПЯТЬ ЗВЁЗД!).

Answer 2

a) 178 - (23 - x) = 111

First, let's simplify the expression inside the parentheses:

178 - (23 - x) = 111

178 - 23 + x = 111 (Use the distributive property, changing the sign inside the parentheses)

155 + x = 111 (Combine like terms)

Now, let's isolate x by subtracting 155 from both sides of the equation:

x = 111 - 155

x = -44

So, the solution to the equation is x = -44.

b) 21x - 7x = 510

Combine like terms on the left side of the equation:

21x - 7x = 14x

Now, the equation becomes:

14x = 510

To solve for x, divide both sides by 14:

x = 510 / 14

x = 36.43 (rounded to two decimal places)

c) (556 + 4x) / 18 = 56

First, multiply both sides of the equation by 18 to isolate the expression on the left side:

18 * ((556 + 4x) / 18) = 18 * (56)

556 + 4x = 1008

Now, subtract 556 from both sides of the equation to isolate 4x:

4x = 1008 - 556

4x = 452

Finally, divide both sides by 4 to solve for x:

x = 452 / 4

x = 113

So, the solution to the equation is x = 113.