math
posted by juan .
solve using substitution
3x4y=5
x=y+2
HELP Me.!

This one is easy. x is already expressed in terms of y in the second equation. You only have to replace the x in the forst equation with the expression from the second equation. You get that:
3*(y+2)4y=5
=>3y+64y=5
=>6y=5
=>y=11
When we place this value for y in the second equation, we find that
x=11+2=13
So, y=11 and x=13
Respond to this Question
Similar Questions

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 you solve this system? I'm using substitution.. y=3x+4 y=x^2 First I combined it: x^2=3x+4 I don't know how to solve it now.. 
math
solve each system of equations by substitution. y=3x9 please help explain how to solve this using substitution. 
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 … 
Calculus 2
Evalute the integral of x/(x^2+4)dx using usubstitution and then trigonometric substitution. I did this and got (1/2)ln(x^2+4)+C using usubstitution and x^2+4+C using trigonometric substitution. What did I do wrong? 
math/ elimination& substitution
how do i solve this? using elimination or substitution? 
Math
Solve using substitution 3x  9y = 3 6x  3y = 24 Solve using elimination y  1/2x = 6 2x + 6y = 19 
Math help
Solve using substitution 3x  9y = 3 6x  3y = 24 Solve using elimination y  1/2x = 6 2x + 6y = 19 
Help please math
Solve using substitution. y = x – 2 x + y = 10 7x + 2y =  8 8y = 4x Solve using elimination. 2x + 3y = 12 2x – y = 4 5x – 2y =  19 2x + 3y = 0 
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.