been stuck on thesse for a while now.

Solve for the missing variable and find the common ratio. ( these are two diffrent problems)

1.)$\displaystyle I run into trouble just afte I cross multiply

X-3, X+1 ,4X-2

$

answer r=3 & R=-1/2

2.)$\displaystyle

X, 10, 25X

$

answer r=5 r=-5