Math
posted by Haylie .
x+y=20
x=y4
Please help me solve each system of equations and show your work thanks

use substitution, sub the 2nd into the 1st
x+y = 20
(y4) + y = 20
2y = 24
y = 12
back into x = y4
x = 124 = 8
x = 8, y = 12
Respond to this Question
Similar Questions

Algebra
Solve the system of equations using substitution. x + 4y = 5 3x  8y = 45 When I tried to solve it, I got x=17 and y=3. When I plugged these into the first equation, it didn't work out at all. Could someone please show me the steps … 
Discrete Math
I am really stuck on these problems. I've worked a lot of them but I can't get these. Sometimes I think I know the answer but I can't show how I got it. 1.) Solve each matrix equation for X. 2X + 5A = B 2.) Find the following matrices: … 
Vectors
Could you please help me solve this question: Solve this system of equations using elementary operations. 1. x/3 + y/4 + z/5 =14 2. x/4 + y/5 + z/3 =21 3. x/5 + y/3 + z/4 =7 So far, I have multiplied all three equations by 60, to … 
Math
Please help! x2y+z=7 2x+yz=0 3x+2y2z=2 a. Solve the above system of equations using Gaussian Elimination or GaussJordan Elimination. You must show row operations. b. Solve the above system of equations using Cramer's Rule. 
Math
I am stuck on trying to figure out how to do this question. Could someone please show me 5 necessary steps ? 
MATH
system of linear equation The sum of 3 numbers is 14 the largest is 4 times the smallest the sum of the smallest and twice the largest is 18 what are the 3 numbers? 
College algebra
system of linear equation The sum of 3 numbers is 14 the largest is 4 times the smallest the sum of the smallest and twice the largest is 18 what are the 3 numbers? 
Math
x=2y+1 x+3y=2 Please help me solve each system of equations and show your work thanks. 
college algebraneed help please!!
solve the equation in the real number system. 2x^423x^3+75x^288x+28=0 What are the real solutions of the equations? 
Algebra
7x + 5 = y 3.5x + 20 = y Solve the system of equations. What method did you use to solve the system and why?