Step-by-step explanation:
siiiiiiiiiiiiiiiiiiiiiiiii
Final Answer: 
Steps/Equations:
Question: 
Step 1: Move the negative sign to the left side.

Step 2: Multiply both sides by
.

Step 3: Simplify
to
.

Step 4: Multiply both sides by
.

~I hope I helped :)~
Answer:
-7
Step-by-step explanation:
y=3x-7
x=0 ⇒ y= 3*0-7= -7
Answer:
i, iii and iv
Step-by-step explanation:
196 = 14²
400 = 20²
324 = 18²
5+5= 10
10 time 9b is 90b
10 times -7 is -70
Then 90b-70