Let the two numbers be x and y.
According to your question;
x + y = 7
10y + x = 10x + y + 9
By equation 1 ; x = 7-y
Substituting the value of x ;
10y + ( 7 -y) = 10(7-y) + y + 9
9y + 7 = 70 -10y + y + 9
9y + 7 = 70 - 9y + 9
=> 18y = 70 -7 + 9
=> 18y = 72
=> y = 4
Substituting for x ;
x = 7 - y
=> x = 7 -4
=> x = 3
Thus, x = 3 and y = 4;
=> The number is 34.
Answer:
−
3
x
+
6
Step-by-step explanation:
Not 100% sure but it might be B
Answer:
x+y = 3
3x-y = 5
Step-by-step explanation:
x+y = 3
3x-y = 5
This system of equation will give the points(2,1).
Lets substitute the values x=2 and y = 1 in the equations:
x+y=3 equation 1
2+1 =3
3=3
3x-y=5 equation 2
3(2)-1=5
6-1=5
5=5
Lets solve the system:
Add the equations to eliminate y from the system:
x+y = 3
3x-y = 5
_______
4x = 8
Now divide both the sides by 4
4x/4 = 8/4
x=2
Now substitute the value of x in equation 1:
x+y=3
2+y=3
Combine the constants:
y=3-2
y=1....
Answer:
thank you very much
Step-by-step explanation:
