I keep getting different answers and none of them equal -2 when I check my work, can someone help.
2007-07-10 06:47:44 · 13 answers · asked by jmarc5069 1 in Science & Mathematics ➔ Mathematics
5(3x+2)-3(4x-3)= -2
(15x + 10) - (12x - 9) = -2
(15x + 10) -12x + 9 = -2
15x - 12x + 10 + 9 = -2
3x + 19 = -2
3x = -21
x = -7
2007-07-10 06:50:48 · answer #1 · answered by MamaMia © 7 · 2⤊ 0⤋
First multiply everything out.
5(3x+2)-3(4x-3)= -2
15x + 10 - 12x + 9 = -2
3x + 19 = -2
3x = -21
x = -7
2007-07-10 06:51:17 · answer #2 · answered by pki15 4 · 1⤊ 0⤋
5(3x+2) - 3(4x-3) = -2
15x + 10 -12x + 9 = -2
3x + 19 = -2
3x = -21
x = -7
Check:
5(-21+2) - 3(-28-3) = 5(-19) - 3(-31) = -95 + 93 = -2
2007-07-10 06:53:45 · answer #3 · answered by Becky M 4 · 0⤊ 0⤋
5(3x+2)-3(4x-3)= -2
15x + 10 - 12x + 9 = -2
15x - 12x + 9 + 10 = -2
3x + 19 = -2
3x = -21
x = -7
2007-07-10 06:51:53 · answer #4 · answered by Sean | 2 · 0⤊ 0⤋
This is a fairly simple solution.
Here's what I come up with:
15x+10-12x+9=-2.
Just move the x values to one side and the rest to the other (remember the sign change when moving across the =) and you should come up with a straighforward answer.
15x-12x=-21
3x=-21
x=-7
2007-07-10 06:53:15 · answer #5 · answered by J P 4 · 0⤊ 0⤋
15x + 10 -12x+ 9 = -2
3x + 19 = -2
3x = -21
x = -7
2007-07-10 06:53:07 · answer #6 · answered by syg m 1 · 0⤊ 0⤋
15x + 10 - 12x + 9 = - 2
3x = - 21
x = - 7
2007-07-10 07:38:27 · answer #7 · answered by Como 7 · 0⤊ 0⤋
15x+10-12x+9=-2
3x+19=-2
-19=-19
3x=-2
---- ---
3 3
x= -2/3
=P
2007-07-10 06:53:10 · answer #8 · answered by kilo27 2 · 0⤊ 1⤋
x= -7
2007-07-10 06:55:47 · answer #9 · answered by BAMBINO 2 · 0⤊ 0⤋
x= -21/3, or -7.
2007-07-10 06:52:05 · answer #10 · answered by Anonymous · 0⤊ 0⤋