2x+y=10
3x-4y=26
x-y=4
2x+y=2
y=2x+3
3x+2y=6
2007-04-27 02:45:58 · 4 answers · asked by Chunky 1 in Education & Reference ➔ Homework Help
2x+y=10
3x-4y=26
1) y=10-2x
2) 3x-4(10-2x)=26
3) 3x-40+8x=26
4) 11x-40=26
5) 11x=66
6) x=6
7) 2(6)+y=10
8) 12+y=10
9) y=-2
Answer: x=6;y=-2
x-y=4
2x+y=2
1) y=x-4
2) 2x+x-4=2
3) 3x-4=2
4) 3x=6
5) x=2
6) 2-y=4
7)y=-2
Answer: x=2;y=-2
y=2x+3
3x+2y=6
1)3x+2(2x+3)=6
2)3x+4x+6=6
3)7x+6=6
4)7x=0
5)x=0
6)y=2(0)+3
7)y=3
Answer: x=0;y=3
2007-04-27 03:02:26 · answer #1 · answered by Iceman 5 · 0⤊ 0⤋
2x + y = 10
3x - 4y = 26
y = 10 - 2x
3x - 4 (10 - 2x) = 26
3x - 40 + 8x = 26
3x + 8x = 26 + 40
11x = 66
x = 66 / 11
x = 6
If x = 6, then
2(6) + y = 10
12 + y = 10
y = 10 - 12
y = -2
Follow the same procedure for the next two problems.
2007-04-27 10:04:08 · answer #2 · answered by Bill W 【ツ】 6 · 0⤊ 0⤋
A. x=6 and y=-2
B. x=6 and y=2
C.x=0 and y=3
2007-04-27 09:56:16 · answer #3 · answered by been there 1 · 0⤊ 0⤋
y=10-2x
3x-4(10-2x)=26
3x-40+8x=26
11x-40+40=26+40
11x=66
x=6
2(6)+y=10
12+y=10
12-12+y=10-12
y= -2
x-y=4
x-y+y=y+4
x=y+4
2(y+4)+y=2
2y+8+y=2
3y+8-8=2-8
3y=-6
y=-2
x-(-2)=4
x+2=4
x=2
y=2x+3
3x+2(2x+3)=6
3x+4x+6=6
7x+6-6=6-6
7x=0
x=0/7=0
y=2(0)+3
y=3
2007-04-27 13:04:24 · answer #4 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋