5x+7=3x-21 -7= -7 5x=3x-14 -3x=-3x 2x=-14 2x/2x=2x/-14 x=-7 The Answer Is -7 -
-3x+7=2x-18 ---> 7+18=2x-3x ----> 25=5x ----> x=5
2x+12-3x = 5 2x-3x = 5-12 -x = -7 x = 7
3X+2=2X-5 -2 -2 __________ 3X= 2X-7 -2X -2X __________ X=-7 Check: 3(-7)+2=2(-7)-5 -19=-19 :)
3x+7=2x-5 x=-12
5x+7=3x-21 -7= -7 5x=3x-14 -3x=-3x 2x=-14 2x/2x=2x/-14 x=-7 The Answer Is -7 -
-2X ? 14- 3x - 7 I am assuming you left something out so I put the question mark in. If it is -2X + 14 - 3x - 7 -Combine like terms -2x - 3x + 14 - 7 -5x + 7 DONE If it is -2X - 14 - 3x - 7 -Combine like terms -2X - 3X - 14 - 7 -5X - 21 DONE
-3x+7=2x-18 ---> 7+18=2x-3x ----> 25=5x ----> x=5
2x+12-3x = 5 2x-3x = 5-12 -x = -7 x = 7
3X+2=2X-5 -2 -2 __________ 3X= 2X-7 -2X -2X __________ X=-7 Check: 3(-7)+2=2(-7)-5 -19=-19 :)
6x2 - 13x - 63 = 6x2 + 14x - 27x - 63 = 2x(3x + 7) - 9(3x + 7) = (3x + 7)(2x - 9)
3x+7=2x-5 x=-12
-3x + (-18) = 2x + 7 +18 +18 -3x = 2x +25 -2x -2x -5x = 25 ----- ----- -5 -5 x=-5 *------- equals a division line
3x+4 = 2x-3 3x-2x = -3-4 x = -7
(3x-2)(2x+7) is the same as 6x^2 +17x -14 when the brackets are multiplied out
3x/7 + 5y/14x = 3x*2x/(7*2x) + 5y/14x = (6x2 + 5y)/14x
2x+12-3x = 5 2x-3x = 5-12 x = -7