Answer:
um what I do is I go from like if I was doing 12 I would go 1 times 12 and then 2 times 6 and 3 times 4 and then I would stop cause it's repetitive if that makes sense
10>z
Step-by-step explanation:
add 4 to both sides
39 = r-13
5.5
57-29.5 / 10-5 = 5.5
a=9