a:10x+15-8x+15=-2
b:6=7(x-4)+x
c:5x+1=6
2007-03-04 00:21:04 · 6 answers · asked by tony t 1 in Science & Mathematics ➔ Mathematics
a. 10x + 15 - 8x +15 = 2x +30 = -2 ==> 2x = -32 ==> x = -32/2 = -16
b. 6 = 7x - 14 + x ==> 8x = 20 ==> x = 20/8 = 5/2
c. 5x +1 = 6 ==> 5x = 6 -1 = 5 ==> x = 5/5 = 1
2007-03-04 00:28:21 · answer #1 · answered by physicist 4 · 0⤊ 0⤋
a) 10x -8x +15+15 = -2
2x+30 = -2
2x= -32
x = -16
b) 6 = 7(x-4) + x
7x- 28 +x = 6
8x - 28 =6
8x = 34
x = 34/8 = 17/4
c) 5x = 5
x= 1
2007-03-04 00:36:33 · answer #2 · answered by Drools over home made food 6 · 0⤊ 0⤋
a. 10X+15-8X+15=-2 FIRST, COMBINE LIKE TERMS,
so 2x+30=-2, so 2x=-32, so x=-32/2,
so x = -16, that's the answer.
b. 6=7(x-4)+x FIRST, DISTRIBUTE, 6=7x-28+x, so
6=8x-28, so 34=8x, so 34/8=x or x=34/8 or
x=4.25, that's the answer
.
c. 5x+1=6, so 5x=5, so x=5/5,
so x=1, that's the answer.
2007-03-04 00:39:19 · answer #3 · answered by popcorn 3 · 0⤊ 0⤋
A. 10x-8x=-2-15-15
2x=-32
therefore, x=-16
B. 6= 7x-28+x
6+28=7x+x
34=8x
therefore, x=34/8
C. 5x=6-1
5x=5
therefore, x=1
Hope they are right!!
2007-03-04 00:30:12 · answer #4 · answered by Frost 3 · 0⤊ 0⤋
a: x= -16
b: 34/8 = x
c: x=1
2007-03-04 00:30:18 · answer #5 · answered by Daniel S. 1 · 0⤊ 0⤋
a. x=1
b. x=6
c. x=1
2007-03-04 00:25:16 · answer #6 · answered by Kurt 2 · 0⤊ 0⤋