Question

matemáticas
3x-1 + X-2 = x-1 + 21
4. 3. 5. 20



2. (4n-1)+1 (5n+2)= - 1
5. 4​

Answer 1

3x - 1 + x - 2 = x - 1 + 21

3x + x - x = - 1 + 21 + 1 + 2

3x = 24 - 1

x = 23/3

x = 7.666 ≈ 7.67

Comprobación

3 (7.67) - 1 + 7.67 - 2 = 7.67 - 1 + 21

23.01 - 1 + 7.67 - 2 = 27.67

27.68 = 27.67

28 = 28

(4n - 1) + 1 (5n + 2) = -1

4n - 1 + 5n + 2 = -1

4n + 5n = - 1 + 1 - 2

9n = -2

n = -2/9

n = -0.222 ≈ -0.23

Comprobación

4 (-0.23) - 1 + 5 (-0.23) + 2 = -1

-0.92 - 1 + 1.15 + 2 = -1

-1.07 = -1

-1 = -1

Espero haberte ayudado. Suerte en los estudios ʕ•́ᴥ•̀ʔっ♡.