You need to find two factors of 5*672 = 3360, whoxe difference is 4: these are 56 and 60.
Then 5x2 - 4x - 672 = 5x2 - 60x + 56x - 672 = 5x(x - 12) + 56(x - 12)
= (x - 12)*(5x + 56)
Expression: x+10+5x Solve: x+5x=6x Answer: 6x+10
5x=30...then x=30/5. So X=6.
x = .5x - 4. Get all of the x's on one side: x - .5x = .5x - .5x -4 ---> .5x = -4 Multiply each side by 2. x = -8
you just equal that equation to 0, then you solve for x 5x-8=0 5x=8 x=8/5
7
128
Expression: x+10+5x Solve: x+5x=6x Answer: 6x+10
x = 3
5x=30...then x=30/5. So X=6.
x = .5x - 4. Get all of the x's on one side: x - .5x = .5x - .5x -4 ---> .5x = -4 Multiply each side by 2. x = -8
you just equal that equation to 0, then you solve for x 5x-8=0 5x=8 x=8/5
7
5x-19 = 16 5x = 16+19 5x = 35 x = 7
-5x+50 = 25 -5x = 25-50 -5x = -25 x = 5
5x = 25Divide both sides by 5:x = 5
It is a linear equation in the variable x. You can solve for x using algebra: -5x + 3 = -22 -5x = -25 -x = -5 x = 5
3x + 2x = 5x