2007-11-01 11:26:53 · 7 answers · asked by LOVELY 1 in Science & Mathematics ➔ Mathematics
28 - 8x = -10x - 2
2x = -30
x = -15
2007-11-01 11:29:56 · answer #1 · answered by Ms. Exxclusive 5 · 0⤊ 1⤋
ok well first you need to multiply the left side out
4*7- 4*2x=-10x-2
28-8x= -10 x -2
OK so get the x's on one side
28-8x-28=-10x-2-28
-8x=-10x-30
-8x+10x=-10x-30+10x
2x=-30
x=-15
BIO student made one mistake..he said that -8x+10x= -2x
when of course -8+10 = PLUS 2
therefore the answer is
not
-2x=-30 , it is 2x=-30
therefore x is NOT 15 but X is -15
also dont listen to the MORON below who calls th rest of the people ignorant..he just did the question a little bit differently
if 30 = -2x
theb BY GOD x has to be -15!!!!!
Pure math shows that -2(15) =-30 not 30
but -2(-15) =30
SO this crap he is saying about something becoming positive once it passes the equal sign is pure nonsence.
2007-11-01 18:33:54 · answer #2 · answered by zanthus 5 · 0⤊ 1⤋
okay rather simple here: 4(7-2x)=-10x-2
28-8x=-10x-2
28+2=-10x + 8x
30= -2x
x=30/2
x=15
2007-11-01 18:33:59 · answer #3 · answered by nightraider1000 1 · 0⤊ 1⤋
4(7-2x)=-10x-2
28 -8x = -10x -2
10x - 8x = -2 -28
2x = -30
x = -15
2007-11-01 18:30:45 · answer #4 · answered by ironduke8159 7 · 1⤊ 0⤋
28-8x=-10x-2
-8x+10x=-2-28
-2x=-30
x=15
2007-11-01 18:30:22 · answer #5 · answered by L.E. 6 · 0⤊ 2⤋
x=-15
2007-11-01 18:29:18 · answer #6 · answered by Anonymous · 0⤊ 2⤋
PEMDAS
(), exponents, x, divide, +, -
2007-11-01 18:30:03 · answer #7 · answered by Abira 4 · 0⤊ 2⤋