Help me with these equations please dont just give me the answer please show step-by-step.....
20 + x = -4x + 15
&
5=5(x-1) + 3 -4x
&
-5 + 6 - 8x = -150
2006-11-06 19:15:29 · 6 answers · asked by Michael B 1 in Science & Mathematics ➔ Mathematics
20 + x = -4x + 15
5x = -5
x = -1
5 = 5(x - 1) + 3 - 4x
5 = 5x - 5 + 3 - 4x
5 = x - 2
x = 3
-5 + 6 - 8x = -150
5 - 6 + 8x = 150
-1 + 8x = 150
8x = 149
x = 149/8
2006-11-06 19:23:55 · answer #1 · answered by Helmut 7 · 1⤊ 0⤋
1. 20+x= -4x+15
x+4x=15-20
5x= -5
x= -5/5
x= -1
2. 5=5(x-1)+3-4x
5=5x-5+3-4x
5=x-2
5+2=x
x= 7
3. -5+6-8x = -150
1-8x = -150
-8x= -150-1
-8x= -151
8x=151
x=151/8
x=18.875
2006-11-06 19:24:32 · answer #2 · answered by Sudhir P 1 · 0⤊ 0⤋
20 + x = - 4x + 15
20 + x - x = - 4x + 15 - x
20 = - 5x + 15
20 - 15 = -5x + 15 - 15
5 = - 5x
5 /-5 = - 5x/-5
- 1 = x
- - - - - - - - - - - - - - - - -
5 = 5(x - 1) + 3 - 4
5 = 5x - 5 + 3 - 4x
5 = x - 2
5 + 2 = x - 2 + 2
7 = x
- - - - - - - - - - - - - - - - -
- 5 + 6 - 8x = - 150
1 - 8x = - 150
1 - 8x - 1 = - 150 - 1
- 8x = - 151
- 8x/-8 = - 151/ - 8
x = 18.875
- - - - - - - - - - - -s-
2006-11-06 21:58:43 · answer #3 · answered by SAMUEL D 7 · 0⤊ 0⤋
1)20+x=-4x+15
=>5x=-5
=>x=-1
2)5=5(x-1) + 3-4x
=>5=5x-5+3-4x
=>5+5-3=x
=>7=x
3)-5+6-8x=-150
=>1-8x=-150
=>151=8x
=>151/8=x
Man to speak frankly looking at solutions won't get you anywhere!
2006-11-06 21:25:34 · answer #4 · answered by sushant 3 · 0⤊ 0⤋
1. 20+x=-4x+15
20+5x=15
5x=-5
x=-1
2. 5=5(x-1)+3-4x
5=5x-5+3-4x
5=x-2
7=x
3. -5+6-8x=-150
1-8x=-150
8x=-151
x=-18+7/8
2006-11-06 19:28:06 · answer #5 · answered by Anonymous · 0⤊ 0⤋
20+x=-4x+15
4x+x= -5
5x=-5
x=-1
ummm.. take it from there mate
2006-11-06 19:28:01 · answer #6 · answered by faithbass 3 · 0⤊ 0⤋