You have it correct the answer is 20
Answer:
30
Step-by-step explanation:
200x.15=30
200-30=170
ANSWER
The smaller number is 7.
EXPLANATION
Let the numbers be x and y.
Then we have;
y-3x=3... eqn (1)
If the sum of the numbers is 3 then,
y+x=31... eqn (2)
Eqn(2) - Eqn (1)
x--3x=31-3

Divide both sides by 4,

We put x=7 into the second equation,
y+7=31
y=31-7
y=24
The smaller of the two numbers is 7.
X+2y=23
X=-2y +23
Plug this in for x in the second equation
5(-2y + 23) + 10y = 55
-10y + 115 + 10y = 55
The -10y + 10y cancel out, so there is no solution
Hope this helps!