algebra
posted by tiffany .
solve the system of equations using substitution.
y = x + 10
y = 3x
a. (5, 15)
b. (2.5, 7.5)
c. (–15, –5)
d. (–5, –15)

algebra 
PsyDAG
3x = x + 10
Solve for x, then put that value in the second equation (above) to find y. Put both in the first equation to check.
Respond to this Question
Similar Questions

Algebra  solving linear equations w/ substitution
The question in the book reads: "Suppose you try to solve a system of linear equations using substitution and get this result. How many solutions does each system have? 
algebra
What is the solution of the system? Solve the system of equations using the substitution method. xy=1 5x+4y=23 
algebra
solve the system of equations using substitution. y = 4x + 2 y = 3x + 6 a. (4, 18) b. (–4, –14) c. (–14, –4) d. (–4, –6) 
algebra
solve the system of equations using substitution. y = 2x + 5 y = 3x a. (–5, –15) b. (5, 15) c. (–15, –5) d. (1, 3) 
algebra
i need help with these problems (either a solution or how to plug them into a graphing calculator): 1) Solve by substitution or elimination 4/x + 1/y + 2/z = 4 2/x + 3/y  1/z = 1 1/x + 1/y + 1/z = 4 2)Solve the system of equations … 
algebra
Solve the system of equations using substitution. y = 2x + 3 y = 3x + 1 
algebra
Solve the system of equations using substitution. y = 2x – 10 y = 4x – 8 
algebra
Solve the system of equations using substitution. y = x + 6 y = –2x – 3 
Algebra
I can find no solution to this system of equations. Solve the system of equations using the substitution method 2x + 4y = 2 2x  y = 4 
algebra
solve the system of equations using the substitution method 8x  9 = y y  8x = 4