If I am correct, 9 plus 7 equals 112.
5a+5=6a-7
This equation is not possible. Two plus three plus four plus five does not equal 287. The system has no solution.
basically you asked what -28+21 which equals -7
59
It equals 24.
It doesn't ! -7 plus -5 equals -12 ! -7 plus 5 equals -2
89
5
7+2+5= 14 35 42
27
96
it is 28
2+5=7 5+2=7 2+5=5+2
If I am correct, 9 plus 7 equals 112.
it is the same i believe
Commutativity of addition.