Solve. Choose the letter for the best answer. (Must show work!)

1. 2/5a = 10

A. a = 5
B. a = 20
C. a = 25

Question

Solve. Choose the letter for the best answer. (Must show work!)

1. 2/5a = 10 

A. a = 5 
B. a = 20 
C. a = 25

hartnn · Answer

multiply 5 on both sides, what do u get ?

anonymous · Answer

8

hartnn · Answer

how ?

anonymous · Answer

by nutiplying both sides by five

hartnn · Answer

what do u get on left side ? 
5* (2/5) x = ... ?

hartnn · Answer

sorry, its 'a' 
5*(2/5) a = ... ?

anonymous · Answer

125

hartnn · Answer

no...
the 5's cancel out
and you just get 
2a on left

hartnn · Answer

2a = 10*5 = 50 
a = 50/2

anonymous · Answer

i need the work shown

anonymous · Answer

so i can understand it

hartnn · Answer

did you not understand my steps ? what doubt u have ?

anonymous · Answer

i did

math&ing001 · Answer

Must so frustrating @hartnn

arbershabani97 · Answer

2/5a=10     /x5
2a=50         //2
a=25

hartnn · Answer

not actually, i've had worse

math&ing001 · Answer

This is why sometimes I just give the answer before I get pissed off.

hartnn · Answer

in any case, giving out answer directly is not allowed at all

anonymous · Answer

It's hard to say from the original syntax, but it looks like you're saying (2/5)a=10.

If so, you need to isolate a by turning the coefficient in front of a into 1.  Do that by multiplying it by the reciprocal (5/2).  In doing so, you must also do the same to the other side of the equation.

Therefore:  (5/2)(2/5)a = 10(5/2)  Leaving you with a=10(5/2)  This is the same as 50/2, or, 25.