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What is "-3+y+y-6+2=6+7

Sagot :

-3y+y+y-6+2=6+7
-5y-4=13
-5y=17
-3 + y + y - 6 + 2 = 6 + 7
-3 + 2y - 4 = 13
-7 + 2y = 13
+7           +7
       2y = 20 
        2      2
         y = 10