1/2 + 2x = (3+4+12)x / 12
1/2 + 2x = 19x/12
1/2 = -5/2 x
x = -1/5
3x12 is 36. 50-36 is 14. so the submarine will be at 14 feet below sea level
1X+8X=90
9X=90
X=10
so one of them is 10 and the other one is 8 times 10 which become 80
Answer:
35 quarters
Step-by-step explanation:8×4=32
32+3=35
