what is 4x-5x(-3)+9x-7x??? someone please help b/c i think im right but he thinks hes right....
2006-08-15 13:52:49 · 19 answers · asked by lin lin 2 in Education & Reference ➔ Other - Education
21x
4x-5x(-3)+9x-7x
= 4x+15x+9x-7x
= 19x+9x-7x
= 28x-7x
= 21x
2006-08-15 13:57:18 · answer #1 · answered by starr 3 · 1⤊ 0⤋
By the rules of distribution, and given the location of the parenthasis, the -3 is being multiplied by the -5x and only the -5x. so we have 4x+15x+9x-7x
=19x+9x-7x
=28x-7x
=21x
2006-08-15 21:01:41 · answer #2 · answered by pilotmanitalia 5 · 0⤊ 0⤋
ok: -5x multiplied by -3 is positive 15x. So 4x+15x+9x-7x=21x. Hope I helped!
2006-08-15 21:06:50 · answer #3 · answered by Shannon 3 · 0⤊ 0⤋
4x-5x(-3)+9x-7x you have to multiply -5 and -3. Signs cancel.
4x+15x+9x-7x Just add and subtract
28x-7x finish it off
21x
2006-08-15 20:57:50 · answer #4 · answered by Cyber 6 · 0⤊ 0⤋
4x - 5x(-3x) + 9x - 7x
4x + 15x + 9x - 7x
4x + 15x + 9x - 7x = 21x
21x
2006-08-15 21:01:14 · answer #5 · answered by TrippingJudy 4 · 0⤊ 0⤋
4x-5x(-3)+9x-7x=
4x+15x+9x-7x=
19x+9x-7x=
28x-7x=
21x
2006-08-15 20:57:54 · answer #6 · answered by s_dol 2 · 0⤊ 0⤋
the answer is 21X...
4x-5x(-3)+9x-7x
4x-(-15x)+9x-7x
4x+15x+9x-7x
19x+9x-7x
28x-7x
21x
2006-08-15 21:01:23 · answer #7 · answered by bleakpurity999 2 · 0⤊ 0⤋
I say it is 21x
because you always multiply and divide numbers before you add and subtract...
2006-08-15 20:59:00 · answer #8 · answered by one_sera_phim 5 · 0⤊ 0⤋
the answer is always 7
2006-08-15 20:56:48 · answer #9 · answered by Mr.No-It-All 5 · 0⤊ 0⤋
I think it is 21x
2006-08-15 21:05:53 · answer #10 · answered by socomgoat 2 · 0⤊ 0⤋