Question

5) Resolva as seguintes equações:
a) 4x - 18 + 3x = 10
b) 5x - 91 = 4x - 77
c) x2 - 49 = 0
d) x2 - 16 = 0
e) 5x2 - 20 = 0​

Answer 1

Resposta:

a) 4x-18+3x= 10

4x+3x= 10+18

7x=28

x=28/7

x= 4

b) 5x-91= 4x-77

5x-4x= -77+91

x= 14