5x - 28 = 12 + 3y
Legend
x = a variable
y= another variable
2006-11-14 19:37:57 · 4 answers · asked by Anonymous in Education & Reference ➔ Homework Help
x = 8
y = 0
2006-11-14 20:04:04 · answer #1 · answered by Darth Jhon 3 · 0⤊ 0⤋
in order to find the value of 2 variables, you need two equations or at lease what one of the letters represent, but another way to solve for them is to substitute zero for each unknown and solve that way...
5x - 28 = 12 + 3y
add 28 to both sides
5x = 40 + 3y
subtract 3y
5x - 3y = 40
when x = 0
5(0) - 3y = 40
divide by (-3)
y = -40/3
when y = 0
5x - 3(0) = 40
divide by (5)
x = 8
2006-11-15 04:26:36 · answer #2 · answered by mustbetoughtobeme 3 · 0⤊ 0⤋
5x-28=12+3y
hence, 5x-3y=40
Linear eqs in 2 variables have many solutions
If x =0, y=-40/3
If x =1, y=-35/3
(take any value of x and find the corresponding value of y)
2006-11-15 07:55:09 · answer #3 · answered by sushobhan 6 · 0⤊ 1⤋
5x-28 = 12+3y
5x = 3y+40
x = 3y+40/5
x = 3/5y + 8
0 = 3/5y + 8
-8 = 3/5y
y = -30
x=0, y= -30
2006-11-15 04:18:49 · answer #4 · answered by tma 6 · 0⤊ 2⤋