7 - 4(11+3b) = -1
-14 = 1.63 - 2.9x
2(x-4) - 5 = 3
9 - 3w + w = 13
5 - 3m = -4
im so stuck on these!!!
blah...
2006-12-19 16:05:19 · 8 answers · asked by Mell 3 in Science & Mathematics ➔ Mathematics
1) 7 - 4(11+3b) = -1
3(11+3b)=-1
33+9b=-1
9b=-1-33
9b=-34
dividing by 9
b=-34/9
2) -14 = 1.63 - 2.9x
add -1.63
-2.9x=-15.63
x=-15.63/-2.9
x = x=15.63/2.9 (minus minus cancel each other)
3) 2(x-4) - 5 = 3
2x-8-5=3
2x-13=3
2x=16
x=8
4) 9 - 3w + w = 13
9-2w=13
-2w=4
w=-2
5) 5 - 3m = -4
-3m=-9
m=3
hope this helps
2006-12-19 16:51:32 · answer #1 · answered by For peace 3 · 0⤊ 0⤋
7-4(11 + 3b) = -1
7 -44 - 12b =-1
-37 - 12b +1= -1 +1
-36 -12b = 0
-36 = 12b
-36/12 = 12b/12
-3= b
-14 = 1.63 - 2.9x
2.9x = 1.63 +14
2.9x = 15.63
2,9x/2.9 = 15.63/2.9
x = 5.389
2(x-4)-5 = 3
2x -8-5 =3
2x-13+13 = 3+13
2x = 16
x = 8
9-3w+w = 13
9-9 -2w = 13-9
-2w =4
W=-2
5-3m = -4
5+4 -3m +3m = -4 +4+3m
9 = 3m
3 = m
2006-12-19 16:49:55 · answer #2 · answered by Grev 4 · 0⤊ 0⤋
7 - 4(11+3b) = -1
7 - 44 - 12b = -1
12b = -36, b = -3
-14 = 1.63 - 2.9x
2.9x = 15.63
x = 5.38965517241 ........
2(x-4)-5 = 3
2x - 8 - 5 = 3
2x = 16, x = 8
9 - 3w + w = 13
-2w = 4
w = -2
5 - 3m = -4
3m = 9
m = 3
2006-12-19 16:34:45 · answer #3 · answered by Srinivas c 2 · 0⤊ 0⤋
7 - 4(11+3b) = -1
3(11+3b)=-1
33+9b=-1
adding -33
9b=34
dividing by 9
b=34/9 3 7/9
-14 = 1.63 - 2.9x
adding -1.63
-2.9x=-15.63
dividing by -2.9
x=-15.63/-2.9
2(x-4) - 5 = 3
2x-8-5=3
2x-13=3
adding 13
2x=16
dividing by 2
x=8
9 - 3w + w = 13
9-2w=13
adding -9
-2w=4
dividing by -2
w=-2
5 - 3m = -4
adding -5
-3m=-9
dividing by -3
m=3
2006-12-19 16:14:02 · answer #4 · answered by raj 7 · 0⤊ 0⤋
[1]
7 - 44 - 12b + 1 = 0
-36 - 12b = 0
12b = -36
b = -3
[2]
-14 - 1.63 = -2.9x
-15.63 = -2.9x
x = -5.3896
[3]
2x - 8 - 5 - 3 = 0
2x - 16 = 0
2x = 16
x = 8
[4]
9 - 2w - 13 = 0
-4 - 2w = 0
-4 = 2w
w = -2
[5]
-3m = -4 - 5
-3m = -9
m = 3
2006-12-19 16:37:06 · answer #5 · answered by Johnny Handsome 2 · 0⤊ 0⤋
1]
7-4(11+3b)=-1
-4(11+3b)=-1-7 (ADDING -7 TO BOTH SIDES)
-4(11+3b)=-8
(11+3b)=-8/-4 (DIVIDING BOTH SIDES BY -4)
(11+3b)=2
3b=2-11 (OPEN BRACE & ADDING -11 )
b=-9/3 (DIVIDING BOTH SIDES BY 3)
b=-3
2]
-14=1.63-2.9x
-14-1.63=-2.9x (ADDINNG -1.63TO BOTH SIDES)
-15.63 =-2.9x
-15.63/-2.9=x (DIVIDING BOTH SIDES BY -2.9)
5.389655 =x (MINUS MINUS CANCEL EACH OTHER)
3]
2(x-4)-5=3
2x-8-5 =3 (OPEN THE BRACE)
2x-13 =3
2x =3+13 (ADDING +13 TO BOTH SIDES)
2x =16
x =8 (DIVIDING BOTH SIDES BY 2)
4]
9-3w+w =13
9-2w =13
-2w =13-9 (ADDING -9 TO BOTH SIDES)
-2w=4
w=-2 (DIVIDING BOTH SIDES BY -2)
5]
5-3w=-4
-3w=-4-5 (ADDING -5 TO BOTH SIDES)
-3w=-9
w=3 (DIVIDING BOTH SIDES BY -3)
ANS ARE:
b=-3
x=5.389655
x =8
w=-2
w=3
2006-12-19 18:16:51 · answer #6 · answered by cham 2 · 0⤊ 0⤋
-7= 3x-8 at the same time as putting -8 to the different fringe of equation, the signal will substitute, so it truly is -7+8= 3x which skill a million=3x for this reason x= a million/3 and don't be afflicted about the order, it doesn't count! there's a rule in math about the order! you may actual verify it by technique of substituting a million/3 into the equation i.e -7= 3*a million/3-8 -7=-7!!!
2016-11-27 21:50:14 · answer #7 · answered by Anonymous · 0⤊ 0⤋
7 - 44 - 12b = -1
-37 - 12b = -1
-12b = 36
b = -3
--------
-2.9x = -15.63
x = 5.38
-------
2x - 13 = 3
2x = 16
x = 8
-------
9 - 2w = 13
-2w = 4
w = -2
-------
-3m = -4
-3 = -4 - 5
-3m = -9
m = 3
2006-12-19 16:17:35 · answer #8 · answered by Anonymous · 0⤊ 0⤋