Tìm x a) 3/5 + x = 2/5 b) 2/3 + 8/7x = 6/7 c) |x – 1/2 | – 1/3 = 1/4 02/11/2021 Bởi Camila Tìm x a) 3/5 + x = 2/5 b) 2/3 + 8/7x = 6/7 c) |x – 1/2 | – 1/3 = 1/4
a)3/5+x=2/5 x=2/5-3/5 x=-1/5 b)2/3+8/7x=6/7 2/3x=6/7-8/7 2/3x=-2/7 x=-2/7:2/3 x=-3/7 c)|x-1/2|-1/3=1/4 |x-1/2|=1/4+1/3 |x-1/2|=7/12 ⟹x-1/2=7/12. Hoặc. x-1/2=-7/12 x=7/12+1/2. x=-7/12+1/2 x=13/12. x=-1/12 Bình luận
a) 3/5+x=2/5 ⇒ x=2/5-3/5 ⇒ x=-1/5 b) 2/3+8/7x=6/7 ⇒ 8/7x=6/7-2/3 ⇒ 8/7x=4/21 ⇒ x=4/21÷8/7 ⇒ x=1/6 c) |x-1/2|-1/3=1/4 ⇒ |x-1/2|=1/4+1/3 ⇒ |x-1/2|=7/12 ⇒ x=7/12+1/2=13/12 x=-7/12+1/2=-1/12 Bình luận
a)3/5+x=2/5
x=2/5-3/5
x=-1/5
b)2/3+8/7x=6/7
2/3x=6/7-8/7
2/3x=-2/7
x=-2/7:2/3
x=-3/7
c)|x-1/2|-1/3=1/4
|x-1/2|=1/4+1/3
|x-1/2|=7/12
⟹x-1/2=7/12. Hoặc. x-1/2=-7/12 x=7/12+1/2. x=-7/12+1/2 x=13/12. x=-1/12
a) 3/5+x=2/5
⇒ x=2/5-3/5
⇒ x=-1/5
b) 2/3+8/7x=6/7
⇒ 8/7x=6/7-2/3
⇒ 8/7x=4/21
⇒ x=4/21÷8/7
⇒ x=1/6
c) |x-1/2|-1/3=1/4
⇒ |x-1/2|=1/4+1/3
⇒ |x-1/2|=7/12
⇒ x=7/12+1/2=13/12
x=-7/12+1/2=-1/12