giúp mik 2 câu này dc k: a, 38x – 12x – 16x = 40 b, 280 – 9x – 2 = 80 18/07/2021 Bởi Sadie giúp mik 2 câu này dc k: a, 38x – 12x – 16x = 40 b, 280 – 9x – 2 = 80
a)38x-12x-16x=40 x.(38-12-16)=40 x.(10) =40 x=40:10 x=4 Vậy x=4 b)280-9x-2=80 280-9x=80+2 280-9x=82 9x=280-82 9x=198 x=198:9 x=22 Vậy x=22 Bình luận
a, 38x – 12x – 16x = 40 (38 – 12 – 16)x = 40 10x = 40 x = 40 : 10 x = 4 b, 280 – 9x – 2 = 80 280 – 9x = 80 + 2 280 – 9x = 82 9x = 280 – 82 9x = 198 x = 198 : 9 x = 22 Bình luận
a)38x-12x-16x=40
x.(38-12-16)=40
x.(10) =40
x=40:10
x=4
Vậy x=4
b)280-9x-2=80
280-9x=80+2
280-9x=82
9x=280-82
9x=198
x=198:9
x=22
Vậy x=22
a, 38x – 12x – 16x = 40
(38 – 12 – 16)x = 40
10x = 40
x = 40 : 10
x = 4
b, 280 – 9x – 2 = 80
280 – 9x = 80 + 2
280 – 9x = 82
9x = 280 – 82
9x = 198
x = 198 : 9
x = 22