2d + 7 = 9
2d = 2
d = 1
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-7d = 50 + 2d -9d = 50 d = -50/9 Or about -5.6
If I am correct, 9 plus 7 equals 112.
Identify the property illustrated 7 + 9 = 9 =7
144 is the answer.2+3=10 which means 2+3=55*2=107+2=63 7+2=99*7=63now 9+7=? 9+7=1616*9=144
9 plus 7 equals 144. Generally, x plus y = x(x+y).