If: m = 20 Then: 3m+18 = 78
2 times -20 equals 40 and 2 plus -20 equals -18
10x3+8=80-60+? 30+8=20+? 38=20+? 38-20=? 18=? The answer is 18.
so 5a = -20 making a = -4
11x = 20x +1811x-20x=18x(11-20)=18-9x=18x=-2
21
12 + 16 + 18 + 20 + 9 = 75
20 = 400
Yes.
If: m = 20 Then: 3m+18 = 78
18 + 10 + 20 + 30 + 15 + 50= 143
16
20+3b = 20 + 3(-6) = 20-18 = 2
2 times -20 equals 40 and 2 plus -20 equals -18
10x3+8=80-60+? 30+8=20+? 38=20+? 38-20=? 18=? The answer is 18.
16 + 16 + 16 + 17 + 18 + 18 + 18 + 19 + 19 + 20 + 20 + 20 + 21 = 238
so 5a = -20 making a = -4