( X + 9 ) + ( X – 8 ) + ( X + 7 ) + ( X – 6 ) + ( X – 5 ) + ( X – 4 ) = 63,6 07/11/2021 Bởi Madeline ( X + 9 ) + ( X – 8 ) + ( X + 7 ) + ( X – 6 ) + ( X – 5 ) + ( X – 4 ) = 63,6
(x + 9) + (x – 8) + (x + 7) + (x – 6) + (x – 5) + (x – 4) = 63,6 x + 9 + x – 8 + x + 7 + x – 6 + x – 5 + x – 4 = 63,6 (x + x + x + x + x + x) + (9 – 8 + 7 – 6 – 5 – 4) = 63,6 6x + (-7) = 63,6 6x – 7 = 63,6 6x = 63,6 + 7 6x = 70,6 x = 70,6 : 6 x ≈ 11,76 Vậy x ≈ 11,76 Bình luận
(x + 9) + (x – 8) + (x + 7) + (x – 6) + (x – 5) + (x – 4) = 63,6
x + 9 + x – 8 + x + 7 + x – 6 + x – 5 + x – 4 = 63,6
(x + x + x + x + x + x) + (9 – 8 + 7 – 6 – 5 – 4) = 63,6
6x + (-7) = 63,6
6x – 7 = 63,6
6x = 63,6 + 7
6x = 70,6
x = 70,6 : 6
x ≈ 11,76
Vậy x ≈ 11,76