43
1 + 2 + 3 + 4 + 6 + 7 + 12 + 14 + 21 + 28 + 42 = 140
12 + 28 + 24 = 64
28 + 12 = 40
-9x-25=3 -9x=28 9x=-28 x=-28/9
It is 7*(12 + 4).
(x + 3)(x + 4) x = -3, -4 Check it. 9 - 21 + 12 = 0 16 - 28 + 12 = 0 It checks.
4 + 8 + 12 + 16 + 14 + 28 + 37 = 119
16+12=28
12 the correct answer is 12.
3/7 of 28 = 28*3/7 = 12
58
28=8x+12-7x 28=8x-7x+12 28=x+12 28-12=x+12-12 16=x