tìm x,y thuộc Z
a, |x + 5 | – x = 7
b, |x + 2 | + | x – 3 | = 8
c, | 2x + 1| = | x – 5 |
d, | x + 3 | + | 2y – 6| = 0
tìm x,y thuộc Z a, |x + 5 | – x = 7 b, |x + 2 | + | x – 3 | = 8 c, | 2x + 1| = | x – 5 | d, | x + 3 | + | 2y – 6| = 0
By Alaia
By Alaia
tìm x,y thuộc Z
a, |x + 5 | – x = 7
b, |x + 2 | + | x – 3 | = 8
c, | 2x + 1| = | x – 5 |
d, | x + 3 | + | 2y – 6| = 0
a,|x+5|-x=7
|x+5|=7+x
1.x+5=7+x=12
2.x+5=-7+x=-2