49
9
U=2.
9
7 + 4u = 70 - 3u[add 3u to both sides]7 + 4u + 3u = 70 - 3u + 3u7 + 7u = 70 + 07 + 7u = 707u = 70 - 77u = 63u = 9
Add 3u to both sides. Subtract 7 from both sides. 7u = 63 u = 9
It equals 24.
96
It doesn't ! -7 plus -5 equals -12 ! -7 plus 5 equals -2
89
If I am correct, 9 plus 7 equals 112.
35
28