Answer:
picture 1 answer : no solution
picture 2 answer : Z= 30
picture 3 answer : X= 6
picture 4 answer : no solution
picture 5 answer : Y= -19
Picture #1:
x/6 + 3 = x/6
cancel x/6
the answer is?no solution
Picture #2
multiply both sides by 5
(6(5 - z))/5 = -z
6(5-z) = -5z
30 - 6z = -5z
30 = z or z = 30
Picture #3
0.7x - 3.9 = .3
0.7x = 4.2
x = 6
Picture #5
multiply by 3 both sides
7 + 10y = 9y - 12
y + 7 = -12
y = -19
Picture #4
6x + 12 + 6 = 2x + 16 + 4x
6x + 18 = 6x + 16
cancel 6x
answer: NO solution
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