Resposta :
Resposta:
a) 21x – 17 = 109 =
[tex]21x - 17 - 109 = 0 \\ 21x - 126 = 0 \\ 21x = 126 \div (21) \\ x = 6[/tex]
b) 73x + 100 = 53x =
[tex]73x + 100 - 53x = 0 \\ 20x + 100 = 0 \\ 20x = - 100 \div (20) \\ x = - 5[/tex]
c) 23x – 22 = 19x + 6 =
[tex]23x - 22 - 19x - 6 = 0 \\ 4x - 28 = 0 \\ 4x = 28 \div (4) \\ x = 7[/tex]
d) 5 + m = 37 =
[tex]5 + m - 37 = 0 \\ m - 32 = 0 \\ m = 32[/tex]