Question

Rezolvati ecuatiile

510 +14x = 762;
3(x + 7) = 75;
14(12 − x) = 70;
111+2x+29=10^3
5x+52-31=30^2-19;

(10^3= 10 la puterea a treia, 30^2= 30 la puterea a doua)
Va rog repede, dau corana, si 5 stelute

Answer 1

Explicație pas cu pas:

explicatie pas cu pas.......

Answer 2

Răspuns:

1. 14x = 762 - 510

14x = 252

x = 252 : 14

x = 18

2. 3× x + 3×7 = 75

3x + 21 = 75

3x = 75 - 21

3x = 54

x = 54: 3

x = 18

3. 14 × 12 -14 x = 70

168 - 14x = 70

- 14 x = 70 - 168

- 14 x = - 98 | × (-1)

14 x = 98

x = 98: 14

x= 7

4. 111+ 2x + 29 = 1000

2x = 1000 - 29 - 111

2x = 860

x =860:2

x = 430

5. 5x +52 - 31 = 900 -19

5x= 900- 19 - 52 +31

5x = 860

x = 860: 5

x = 172