2006-06-13 15:32:30 · 7 answers · asked by joe6042@sbcglobal.net 1 in Education & Reference ➔ Homework Help
2x-6-3x+15=21*(x-2)
-x+9=21x-42
51=22x
x=51/22, but I don't think you meant multiply by 7 at the end.
2006-06-13 15:36:40 · answer #1 · answered by PhysicsPat 4 · 0⤊ 1⤋
2(x-3)-3(x-5)=3(x-2)7
2x-6-3x+15=21(x-2) ---- use distributive law, multiply number in front of brackets by everything inside; 3x7
2x-6-3x+15=21x-42 (used distributive law again)
2x-3x-21x=-42+6-15 (moved x to left side, numbers to right)
-22x=-51 (collect like terms)
x=51/22 (both sides divided by 22)
>< i think you forgot a plus/minus sign... weird to have it like that
if it's +7...
2(x-3)-3(x-5)=3(x-2)+7
2x-6-3x+15=3x-6+7 (distributive law)
-x+9=3x+1 (simplify each side)
-4x=-8 (collect like terms by moving x to one side, no. to other)
x=2 (divide both sides by -4)
if it's -7
2(x-3)-3(x-5)=3(x-2)-7
2x-6-3x+15=3x-6-7 (distributive law)
-x+9=3x-13 (simplify each side)
-4x=-22 (collect like terms)
x=22/4 or 11/2 (divide both sides by -4)
2006-06-13 23:28:12 · answer #2 · answered by asrael_espoir 3 · 0⤊ 0⤋
2 ( x - 3 ) - 3 ( x - 5 ) = 3 ( x - 2 )
( 2x - 6 ) + ( -3x + 15 ) = ( 3x - 6 )
2x - 6 - 3x + 15 = 3x - 6
2x - 3x - 3x = -6 + 6 - 15
-6x = -15
x = 15 / 6
x = 5 / 2
x = 2.5
2006-06-13 22:56:53 · answer #3 · answered by Anonymous · 0⤊ 0⤋
I think it is 2.318, but it is unusual for there to be something like the 7 at the end.
2006-06-13 22:55:23 · answer #4 · answered by jhsingson 1 · 0⤊ 0⤋
2x-6-3x+15=(3x-6)7
-x+9=21x-42
22x=51
x=51/22
2006-06-13 23:01:09 · answer #5 · answered by honeybun 4 · 0⤊ 0⤋
2x-6-3x+15=(3x-6)7
-x-+9=21x-42
9+42=21x+x
51=22x
51/22=x
2.318=x
2006-06-13 23:05:20 · answer #6 · answered by masterchief irl 2 · 0⤊ 0⤋
2x-6-3x+15=3x-6(7)
-1x+9=3x-42
2x+9=-42
2x=-33
-16.5
2006-06-13 22:56:44 · answer #7 · answered by Kyle W 1 · 0⤊ 0⤋