Answer:
Multiply the first equation by five to yield, 15x + 5y = 45. Add this equation to the second equation from the given,
15x + 5y = 45
+ 3x - 5y = 15
The answer would be 18x = 60. The value of x is 10/3. Therefore, the answer to this item is letter A.
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Step-by-step explanation:
Answer:
Step-by-step explanation:
The reciprocal of a number n is 
Given 8 
, change to an improper fraction
= 
= 
, thus
reciprocal = 
=
Answer:
9-3x=20
Step-by-step explanation:
It is the wordplay
Answer:
B
Step-by-step explanation:
The rest of the options are possible using an atm card. but using it to deposit is not possible.
Answer:
x=3, y=-1
Step-by-step explanation:
x+y = 2
x -y =4
I will use elimination to eliminate the variable y. Add the two equations together.
x+y = 2
x -y =4
-------------
2x = 6
Divide each side by 2
2x/2 = 6/2
x = 3
But we still don't know y
x+y =2
Substitute x=3 into the equation
3+y =2
Subtract 3 from each side
3-3 +y =2-3
y =-1
