X=7778+1912
X=9690
X=9690x8
X=77520
X=77520:3
X=25840
vậy X=25840
X x 3:8 - 1912 = 7778
X = 7778 + 1912
X = 9690
X =9690 x 8
X = 77520
X = 77520:3
X = 25840
Đáp số : X = 25840
X * 3 / 8 - 1912 = 7778
X * 3 / 8 = 7778 + 1912
X * 3 / 8 = 9690
X * 3 = 9690 * 8
X * 3 = 77520
X = 77520 / 3
X = 25840
Xx3:8-1912=7778 Xx3:8=[1912+7778] Xx3:8=9690 Xx3=9690x8 Xx3=77520 X=77520:3 X=25840