You can use keep it change it flip it and do:
7/10•9/5=63/50= 1 3/50
7•9=63
10•5=50
Hope this helped
Answer:
(A) 66k+9
Step-by-step explanation:
50k+5+4+16k
The middle one would be the correct answer
you just need to substitute 3 in for x and solve each equation until both equations have y=-1