3c+4d=30
3d+2c=21
solve sec x =- 1.5 in the range of -180<=x<=180
15c-8d=50
5c+4d=50
3y-x=5
5y-2x=1
3y_x=5
3y+8x=22
y+6x=9
7x-6y=30
2x+6y=24
Ali had some marbles. He could group them into sets of 5 marbles or sets of 8 marbles without leaving any remainder. However, when...
how to solve this pattern 2,4,8,3,5,14,4,6,22,7,9,_______?
2x+3y=8
3x+4y=11
