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−2+8=−2 -2x+2y= -8
3x-2y= 11
+
-2x+2y= -8
-----------------
x= 3
3x-2y= 11
3(3)-2y= 11
9-2y= 11
-2y= 11-9
-2y= 2
y= 2/-2
y= -1
2. 3+11=67
5−3=5
-----------------------
m= 4
n= 5
3. 2+3=17
3+2=18
-----------------------
a= 4
b= 3
4. −2+5−11=0
3−6=−27
--------------------------
d= -23
e= -7
5. 3+6=39
−3+7=52
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x= 143/17
y= 39/17