Question

resolva as equações do 1 grau: a) x-30=25=? b) 5(x-1)=x+4= ? c) 2x-3=7=?​

Answer 1

A. x - 30 = 25

x = 25 + 30

x = 55

B. 5(x - 1) = x + 4

5x - 5 = x + 4

5x - x = 4 + 5

4x = 9

x = 9/4

x = 2,25

C. 2x - 3 = 7

2x = 7 + 3

2x = 10

x = 10/2

x = 5