Question

Resolva as equações do 1° grau:

c) 5(2x–4)=7(x+1)–3

d) 3(2x+3)–4(x–1)=3​

Answer 1

c)

5(2x - 4)= 7(x + 1) - 3

10x - 20= 7x + 7 - 3

10x - 7x= 7 - 3 + 20

3x= 24

x= 24/3

x= 8

d)

3(2x + 3) - 4(x - 1)= 3

6x + 9 - 4x + 4= 3

6x - 4x= 3 - 9 - 4

2x= - 10

x= - 10/2

x= - 5