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sydc98sydc98
I believe this should help. :)
Ver imagen sydc98sydc98
So what you do is you circle 7m -15 8m +20 and -m then you combine like terms which is 7m, 8m -m. -m has a -1 in front so you do 7 + 8 -1 which equals. 14 so then you combine -15 and 20 so -15 + 20 equals 35 so m= 35 hope this helps :)