SOLUTION: 3x-y=5 2x+y=15 Solve each of the following systems of equations using the method of substitution. If the system is inconcistent or dependent, say no. I am needing a bit o

Question 114905:
3x-y=5
2x+y=15
Solve each of the following systems of equations using the method of substitution. If the system is inconcistent or dependent, say no.
I am needing a bit of refresher on this. I have been away from it too long. Can you help please. Thanks.
Answer by checkley71(8403) (Show Source): You can put this solution on YOUR website!
ARE YOU SURE THERE ISN'T AN = SIGN IN THE SECOND EQUATION???????
3X-Y=5 OR -Y=-3X+5 OR Y=3X-5 NOW SUBSTITUTE (3X-5) FOR Y IN THE OTHER EQUATION.
2X+(3X-5)=15
2X+3X-5=15
5X=15+5
5X=20
X=20/5
X=4 ANSWER.
3*4-Y=5
12-Y=5
-Y=5-12
-Y=-7
Y=7 ANSWER.
PROOF
2*4+7=15
8+7=15
15=15
RELATED QUESTIONS
Solve the following systems of equations using the substitution method. What type of... (answered by Fombitz)

Solve the following systems of equations using the substitution method. What type of... (answered by rfer)

solve each system of equations by using the substitution method. {3x + 4y = 18 { (answered by Edwin McCravy)

Solving systems of linear equations using the substitution method Problem: 2x-y=6 (answered by stanbon)

solving systems by substitution solve each system of equations using the substitution... (answered by mananth)

solve the system of equations using the substitution method 3x + y+ 2 2x - y +... (answered by rednail)

Solve the following system of equations using any algebraic method y=-3x+5... (answered by macston)

Solve the following system of equations using the substitution method y=x+5,... (answered by drj,sofiyac)

y=-x+5 y=2x-4 Solve the following systems of equations using any... (answered by stanbon,MathLover1)