2006-06-21 01:57:03 · 5 answers · asked by marcylina m 1 in Science & Mathematics ➔ Mathematics
5y+2x=-4--------(1)
y=3x-7-----------(2)
Substitute the value of y from (2) into (1), we get
5(3x-7)+2x=4
15x-35+2x=4
17x-35=4
17x=39
x=39/17
now, y=3(39/17)-7=-2/17
2006-06-21 02:10:57 · answer #1 · answered by K N Swamy 3 · 0⤊ 1⤋
5y + 2x = -4
y = 3x - 7
5(3x - 7) + 2x = -4
15x - 35 + 2x = -4
17x - 35 = -4
17x = 31
x = (31/17)
y = 3(31/17) - 7
y = (93/17) - 7
y = (93/17) - (119/7)
y = (93 - 119)/7
y = (-26/7)
x = (31/7)
y = (-26/7)
2006-06-21 11:30:59 · answer #2 · answered by Sherman81 6 · 0⤊ 0⤋
5y + 2x =-4
5(3x-7)+2x=-4
15x-35+2x=-4
17x=-4+35
x=31/17
x=1.82
y=3x-7
y=3*1.82 -7
y=-1.54
Check
5*(-1.54)+2*1.82=-4
-7.7+3.64=-4
-4=-4 checked
2006-06-21 09:13:17 · answer #3 · answered by Carla 4 · 0⤊ 0⤋
x= 1.82
y= -1.54
2006-06-21 09:04:45 · answer #4 · answered by cappuccino 2 · 0⤊ 0⤋
x=1.82
y=-1.54
Cheating ur teacher....hmmm?????
2006-06-21 09:06:53 · answer #5 · answered by tejas_fundo 3 · 0⤊ 0⤋