13=13.1=1.13=(−1).(−13)=(−13).(−1)13=13.1=1.13=(-1).(-13)=(-13).(-1)
+
x−13=13⇒x=13+13⇒x=26x-13=13⇒x=13+13⇒x=26
y+2=1⇒y=1−2⇒y=−1y+2=1⇒y=1-2⇒y=-1
hoặc
x−13=1⇒x=1+13⇒x=14x-13=1⇒x=1+13⇒x=14
y+2=13⇒y=13−2⇒y=11y+2=13⇒y=13-2⇒y=11
hoặc
x−13=−1⇒x=−1+13⇒x=12x-13=-1⇒x=-1+13⇒x=12
y+2=−13⇒y=−13−2⇒y=−15y+2=-13⇒y=-13-2⇒y=-15
hoặc
x−13=−13⇒x=−13+13⇒x=0x-13=-13⇒x=-13+13⇒x=0
y+2=−1⇒y=−1−2⇒y=−3
Cho mình Câu trả lời hay nhất, 5 sao và cám ơn nhé :333 xin cảm ơn !!!