Resposta :
D = d. q + r
D = 5.7 + 1
D = 35 +1
D = 36
1) x + 7 = 56+7=63
2) x+14= 56+14=70
3) x +21=56+21=77 ===> 7+7 = 14
x +7+x+14+x+21 = 210
3x +42 =210
3x = 210-42
3x = 168
x = 168/3
x=56
D = 5.7 + 1
D = 35 +1
D = 36
1) x + 7 = 56+7=63
2) x+14= 56+14=70
3) x +21=56+21=77 ===> 7+7 = 14
x +7+x+14+x+21 = 210
3x +42 =210
3x = 210-42
3x = 168
x = 168/3
x=56