Let
x---------> the number
we know that
[9+2x]*4=4x+12
36+8x=4x+12
8x-4x=12-36
4x=-24
x=-24/4
x=-6
the answer is
-6
58-13=45 45/9=5 Carlos rented the bike for 5 hours
404 3 digit number, even, adds up to eight, the tens is less than two!
By hypothesis, Deon is riding at a speed of 22.4 kilometers per hour. So each hour, he completes 22.4 km.
If he rides for 7 hours, he completes 22.4 * 7 = 156.8 km
So in 7 hours, he rides 156.8 kilometers.
Hope this helps! :)
3(k-2)² -2
3(k²-4k+4) -2
3k²-12k+12-2
3k² -12k +10