3x - 4y = 1
2x + 3y = 18
Solve with one method of your choice. Thanks.
2007-10-08 21:42:14 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
3x=1+4y
x=(1+4y)/3
2*(1+4y)/3+3y=18
2+8y+9y=54
17y=52
y=52/17
2x+(3*52/17)=18
34x=306-156
x=150/34
x=75/17
check:
3*75/17-4*52/17=1
225-208=17
17=17
OK
2007-10-08 21:48:11 · answer #1 · answered by Anonymous · 0⤊ 0⤋
substitution method
by uday k Member since:
September 28, 2007
Total points:
386 (Level 2) 3x - 4y = 1
3x=1+4y
multiply by 2
6x=2+8y --->1
2x + 3y = 18
multiply by 3
6x+9y=54
substitue the valu of 6x here
we get
2+8y+9y=54
17y=52
y=52/17
substitue the value of y in 1
6x=2+8*52/17
x=75/17
2007-10-09 04:46:48 · answer #2 · answered by uday k 2 · 0⤊ 0⤋
9x - 12y = 3
8x + 12y = 72----ADD
17x = 75
x = 75 / 17
150/17 + 3y = 18
3y = 18 - 150/17
3y = 306/17 - 150/17
3y = 156 / 17
y = 52 / 17
Answer is x = 75 / 17 , y = 52 / 17
2007-10-09 05:03:23 · answer #3 · answered by Como 7 · 0⤊ 0⤋