Posted by rachel on Tuesday, December 6, 2011 at 7:48pm.
Solve by substitution.
y=.8x+72
20x+32y=48
How do you get y? i got the x part but i can't seem to get the y part.

algebra 1  bobpursley, Tuesday, December 6, 2011 at 7:49pm
solve this:
20x+32 (.8x+72)=48
then, you have x. Then solve y=.8x+72

algebra 1  rachel, Tuesday, December 6, 2011 at 8:02pm
i actually wrote the second part wrong. Its supposed to be y=.8x+7.2 not 72. and when i solved it i got 10.4 for y and my x is 4.

algebra 1  rachel, Tuesday, December 6, 2011 at 8:13pm
Is it right?
Answer This Question
Related Questions
 algebra  How do i use substitution to solve each system? y= 0.8x + 7.2 20x + ...
 Math  use substitution method for solving x+y=4 (x+2)^2+(y3)^2=5 I got the ...
 Math  use substitution method for solving x+y=4 (x+2)^2+(y3)^2=5 I got the ...
 Algebra  2(0.53y) + y > (4y0.2)8 I understand how to solve the problem, ...
 Algebra help please  Part A: Divide (16x^5y^4 + 6x^3y  2x^2y  24x^2y^4) by ...
 algebra :( help me!!  The table below shows the weekly earnings of two groups ...
 math...  A. Solve a9=20 I did 20+9=29 299=20 a=29 Part b solve b9>20 I ...
 Math  Calculate the integrals by partial fractions and using the indicated ...
 AlgebraPlease check  5  sqrt of 20x + 4 >= 3 5 20x + 4 >= 3 54  ...
 college math  in a conjecture the answer i got was 12n how would it look if it ...
More Related Questions