lz-12l=98
\(\Rightarrow\)z-12=98 hoac z-12=-98
th1:z-12=98
z=98+12
z=110
th2:z-12=-98
z=-98+12
z=-86
vay z=110 hoac z = -86
lx-98l=0+98
lx-98l=98
\(\Rightarrow\)x-98=98 hoac x-98=-98
th1:x-98=98
x=98+98
x=196
th2:x-98=-98
x=-98+98
x=0
vay x=196 hoac x = 0
chuan do nhe l i k e mk nha