The volume of the box is length*width*height
So length*3cm*3cm=45cm³
Let
the length of the box
We have
⇒
⇒
So the length should be 5 cm.
Answer: 3x
Step-by-step explanation: just need points
What you are doing is absolutely correct
x + 8 = 90+64
x= 154 -8
X = 146
First you convert them to 15/20 then 8/20 after that subract them, so 7/20
Let "the number" = x
3x - 6 = 45 is your equation
Solve for x. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.
Isolate the x. First, add 6 to both sides
3x - 6 (+6) = 45 (+6)
3x = 51
Isolate the x. Divide 3 from both sides
3x/3 = 51/3
x = 51/3
x = 17
17 is your answer for "a number".
hope this helps