1). 7 = z/4

Question

2). -7 = 9 - 7
3). t/6 = -7
4). 20 = x - 3x
5). 5/6x - 1/3 = 5/2
6). (29.5 - 7)/ 1.25
7). 2/3 = 4j/ 6

My answers to these questions are the following:
1). z = 28
2). q = 0
3). t = -42
4). ?
5). ?
6). ?
7). ?

Answer 1

1 and 3 are right. 2???

4).
20 = x - 3x
20 = -2x
-10 = x

5.
5/6x - 1/3 = 5/2
5/6x = 5/2 + 1/3
5/6x = 15/6 + 2/6
5/6x = 17/6
x = (17/6) / (5/6)
x = (17/6) * (6/5)
x = 102/30 = 3 2/5

You can try the last two yourself. I'll be glad to check your answers.

Answer 2

#2. ? where did q come from?
#4 x = -10
#5 x = 17/5
#6 18
#7 j = 1