3x - 8 = 5x + 2 <+8 and - 5x off each side> -2x = 10 <divide each side by -2x> x = -5
3x + 2 + 2x = 7; 3x + 2x = 5x, so 5x + 2 = 7; 7-2=5, so 5x=5. 5x divided by 5 and 5 divided by 5 equals 1, so x equals 1.
6-3x = 5x-10x+10 6-3x = -5x+10 -3x+5x = 10-6 2x = 4 x = 2
It is a mathematical equation, usually written like this: 5x - 7 + 2x = 3x - 2 + 4x
LMN = LM + MN = 3x + (2x +2) = 5x + 2
3x2 + 5x + 2 is a quadratic expression that can be factored as follows: 3x2 + 5x + 2 = 3x2 + 3x + 2x + 2 = 3x(x + 1) + 2(x + 1) = (3x + 2)(x + 1)
3x+2 = 5x so 2x = 2 and hence x = 2/2 = 1
3x + 5x = 2x + 28x = 2x + 26x = 2x = (2/6) = 1/3
2(3x + 4) + 5x - 2
yes. check: 3x-6=5x-10 2x=4. X=2. yay!
5x-2 = 3x-6 5x = 3x - 6 +2 5x = 3x - 4 5x - 3x = -4 2x = -4 x = -2
3x+2y=20 5x-2y=1 (3x+2y) + (5x-2y)= 20+1 3x+5x= 21....... 8x=21.........x=2 5/8 Subsitute x=3(2 5/8)+ 2y=20........... 7 7/8 +2y=20.........2y= 20- 7 7/8....... y=6 1/16
6x^2 + 5x + 1 = (3x +1) (2x + 1)
x=1 2/3 How?: 2x-4+3 = 5x-6 2x-1 = 5x-6 2x-1+1 = 5x-6+1 2x = 5x-5 2x-5x = 5x-5x-5 -3x = -5 -3x/-3 = -5/-3 x = 5/3 x = 1 2/3
2x - 5x = -6 -3x = -6 3x = 6 x = 6/3 x = 2 By Mohammed Arafat
5x+2=x+10 5x-x=10-2 4x=8 x=2
(3x + 4)(2x - 1) = 0 3x = -4 x = -4/3 2x = 1 x = 1/2 x = 1/2, -4/3
if the number is the same: 2x + 3x = 13 5x = 13 x= 13/5