Question

EQUAÇÃO DO 1° GRAU 21X-17=109

Answer 1

21x - 17 = 109
21x = 109 + 17
21x = 126
x = 126/21
x = 6

Answer 2

$21x - 17 = 109 \\ 21x = 109 + 17 \\ 21x = 126 \\ x = \frac{126}{21} \\ x = 6$