找到你今天要练的题。

\( 8x+y=5 \) 
\( y=9x+1 \) 
The solution to the given system of equations is (x, y). What is the value of x? 

x +3=-2y +5
x -3 =2y +7
The solution to the given system of equations is (x,y). What is the value of 2x?

x =5
y = x -8
Which of the following points (x,y ) is the solution to the given system of equations in the xy-plane?

A sample of a certain alloy has a total mass of 50.0 grams and is 50.0% silicon by mass. The sample was created by combining two pieces of different alloys. The first piece was 30.0% silicon by mass and the second piece was 80.0% silicon by mass. What was the mass, in grams, of the silicon in the second piece?

\( x=3 \) 
\( y=\left(15-x\right)^2 \) 
A solution to the given system of equations is (x, y). What is the value of xy?

The graph of a system of a linear equation and a nonlinear equation is shown. What is the solution (x, y) to this system?

\( x=4 \) 
\( y=5-x \) 
The solution to the given system of equations is (x, y). What is the value of y?

\( y=\frac{1}{3}x-14 \) 
\( y=-x+18 \) 
The solution to the given system of equations is (x, y). What is the value of x?

A movie theater sells two types of tickets, adult tickets for $12 and child tickets for $8. If the theater sold 30 tickets for a total of $300, how much, in dollars, was spent on adult tickets? (Disregard the $ sign when gridding your answer.)

5x +14y =45
10x + 7y =27
The solution to the given system of equations is (x , y ) . What is the value of xy ?

Store A sells raspberries for $5.50 per pint and blackberries for $3.0 per pint. Store B sells raspberries for $6.5 per pint and blackberries for $8.00 per pint. A certain purchase of raspberries and blackberries would cost $37.00 at Store A or $66.00 at Store B. How many pints of blackberries are in this purchase?

-x + y =-3.5
x +3y =9.5
If (x , y ) satisfies the system of equations above, what is the value of y ?