5x+3t=19
5x-3t=1
2006-11-24 11:40:51 · 4 answers · asked by bbrown0991 1 in Science & Mathematics ➔ Mathematics
5x + 3t = 19
-(5x -3t = 1)
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6t = 18
t = 3
5x + 3(3) = 19
5x + 9 = 19
5x = 10
x = 2
5(2) - 3(3) = 1
10 -9 = 1
2006-11-24 11:43:20 · answer #1 · answered by bgdddymtty 3 · 0⤊ 0⤋
get rid of x by multiplying -1
-5x-3t= -19
5x-3t= 1
add them up
-6t=-18
t= 3
subt 3 back in for t
5x-3(3)= 1
5x-9= 1
5x=10
x=2
check: 5(2)+3(3)=19
2006-11-24 19:46:55 · answer #2 · answered by 7 · 0⤊ 0⤋
add 1st equation to the second, and you get 10x = 20, x = 2. Then 5(2) - 3t = 1, so -3t = -9, so t=3.
2006-11-24 19:43:53 · answer #3 · answered by Jim Burnell 6 · 0⤊ 0⤋
3t = 19 - 5x
3t = 5x - 1
19 - 5x = 5x -1
10x = 20
x = 2
3t = 5x - 1 = 9
t = 3
2006-11-24 19:52:00 · answer #4 · answered by hznfrst 6 · 0⤊ 0⤋