math
posted by Jennifer .
solve by the substitution method
5x+7y=6
6x+y=21

math 
Reiny
from the 2nd > y = 21 + 6x
plug that into the 1st
5x + 7(21+6x) = 6 solve for x, then sub back into
y = 21+6x
Respond to this Question
Similar Questions

Substitution Method
Use the Substitution method to solve the system of equations. x + y = 4 x  y = 2 x + y = 4 x  y = 2 In the second equation, x= y+2 Putting that in the first.. (y+2) + y= 4 subtract two from each side, then divide each side by … 
Substitution MethodPlz help
Use the Substitution method to solve the system of equations. x + y = 4 x  y = 2 solve for x in the second equation. x= y+2 Put that in for x in the first equation: x+y=4 (y+2) + y = 4 solve for y. Then, x= y+2 i don't get it.How … 
Math
How do I solve these problems, I really need help. Solve by substitution method 6x+5y=17 x=538y Solve by elimination method 2x+3y=5 4x+6y=10 
math
Solve by elimination method. 2r5s=33 5r+2s=48 Solve by substitution method. 5x+6y=5 x9y=40 I always get these two confused... can someone please help me with these two problems? 
Linear Equations
Can you please help solve this equation using the substitution method? 
math substitution method
use the substitution method to solve 7x+5y=26 x=286y 
substitution method
Solve by substitution method please help me solve this. I do not know how to do this at all. The question is 3x+8y=33 and x=316y I know that I have to plug x into the first x like 3(316y)+ 8y = 33 but i do not know what to do from … 
Algebra 1
bobpursey, In this problem you helped me with earlier: Solve using any appropriate method. y = 2×  5, y = ½× + 1 Substitution, substitute for y. 2×5=½ × + 1 3/2 x=6 x=4 y= 2*45=3 How did you choose which method you were going … 
Math
17) solve this linear system using the method of substitution. 2yx=10 y= 3/2x1 20) simplify then solve by substitution 2(x4)+y=6 3x2(y3)=13 just need help with these 2. 
Algebra PLEASE HELP!!
What advantages does the method of substitution have over graphing for solving systems of equations?