Answer:
ion even know
1. minus
2. srry i dunno this one
3. minus (again)
21z+84
Step-by-step explanation.
7x3=21 then put the z at the end 21z.
7x12=84. Put it after the 21z. 21z+84
z = -1
Step-by-step explanation:
add like terms: 13z = -13
divide both sides by 13: z = -1