How do you solve this algebra expression problem?

Question

Ok I dont understand how to solve this problem
2xyz+5
if 
x=2
y=3
z=4
I dont understand how you multiply all that variables at once
could some one please explain to me how to answer this problem
It is quite difficult for me because I skipped pre-algebra and do not quite remember how to solve these types of problems

Pranil · Accepted Answer

2xyz+5
2xyz + 5
= (2 × x × y × z)+(5) ---------- substitute values of x, y and z
= (2 × 2 × 3 × 4) + 5
= 48 + 5
= 53
----------

MIC · Answer

When there is no sign between numbers/variables, that implies multiplication.  So your equation could be written 2*x*y*z+5.  You know the values of the variables, so you just substitute those values for the corresponding letter.  The equation now looks like: 2*2*3*4+5
You perform multiplication before addition and you can do the multiplication steps one at a time.   2*2=4, so that answer times the next number. 4*3=12, then that answer times the next 12*4=48, and then complete the addition, 48+5=53.

Vero · Answer

Well first you plug in all the numbers:
2(2)(3)(4)+5,
then you multiply first: 2*2=4*3=12*4=48
Once you get that which equals 48 in this case, then you add the 5 which is going to come out to be 53.
But remember you have to multiply first then add. O.K.

Repperphant · Answer

It helps if you put each term in brackets

So instead of 
2xyz+5

You can have
(2)(x)(y)(z)+(5)

We can now sub the numbers in you've already got, thus giving us

(2)(2)(3)(4)+5

If terms are next to each other with no sign it means to multiply them.

You don't need to do all the multipications at once either.
For example you could do:
((2)(2))((3)(4))+5
or
(2*2)(3*4)+5

this simplifies down to
(4)(12)+5
which then again simplifies to
(48)+5
which finally equals 
53.

Anonymous · Answer

2xyz+ 5
subbing in the values of xyandz
2 X 2 X 3 X 4 + 5 
just multiply them one at a time
4X 3 X 4 +5
12 X 4 +5
48+ 5
53
remember PEMDAS?? parenthesis exponents multiplication addition then subtraction thats the order to go in

jenh42002 · Answer

Replace each variable by its value:


2(2)(3)(4) + 5            

Multiply:  2*2*3*4 = 4*3*4 = 12*4 =48

48 + 5

53

M B · Answer

the answer is 53.  you want to multiply 2 times 2, 3, and 4 then take that answer then add 5 to that.

May S · Answer

the thing is wen there is a problem like that its mostly multiplication so just do 2x2x3x4=48 and then add the 5= 53

munkiluvrmp · Answer

2x2=4
4x3=12 etc. you just multiply 2 and the multiply the answer times the next #

dan g · Answer

it does not matter in which order you multiply them!

2(2)(3)(4)+5

it is saying 2x2x3x4+5

you just need to do the short math it is nice and easy!

53

How do you solve this algebra expression problem?

11 Answers