Question

Por favor preciso urgenteeeeee

Answer 1

1) a) x ≠ 0

b) x - 7 ≠ 0
x ≠ 7

3) (a²b³)/(ab²c) = (ab)/c

(a⁶b⁵c²)/(a⁵b⁴c³) = (ab)/c

As duas frações algébricas são iguais

4) a) (3m + 4)/(5m) = 5/7
7(3m + 4) = 5(5m)
21m + 28 = 25m
21m - 25m = - 28
- 4m = - 28
4m = 28
m = 28/4

m = 7

b) (x + 7)/(3x) = 3/2
2(x + 7) = 3(3x)
2x + 14 = 9x
2x - 9x = - 14
- 7x = - 14
7x = 14
x = 14/7

x = 2

c) 1/(3x - 2) = 5/(x - 2)
1(x - 2) = 5(3x - 2)
x - 2 = 15x - 10
x - 15x = - 10 + 2
- 14x = - 8
14x = 8
x= 8/14

x = 4/7