For number 9 just take the two functions and multiply or add them I can’t tell what sign that is
4x+18=7x-12
We move all terms to the left:
4x+18-(7x-12)=0
We get rid of parentheses
4x-7x+12+18=0
We add all the numbers together, and all the variables
-3x+30=0
We move all terms containing x to the left, all other terms to the right
-3x=-30
x=-30/-3
x=+10
Hope this helps :)
6,000 ÷ 15= 400; 400 × 2= 800
The answer is 800 meters
Hope this helps :)
Answer:
1) 2
2) -2
Step-by-step explanation:
1)
x - 5 = -3
Add 5 to both sides
x = 2
2)
3 - 2x = x + 9
Add 2x to both sides.
3 = 3x + 9
Subtract 9 from both sides
-6 = 3x
Divide both sides by 3
-2 = x
x = -2
Hope this helps you understand! :D