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Assuming that the equation is:
-5x (9-4x) = 12
then:
20x2 - 45x -12 = 0
a x2 + bx + c = 0
Accordingly, a = 20, b = -45, c = -12
x = [ 45 +- (-45 x-45 - 4 x 20 x -12)1/2]/2 x 20 = [45 +- (54.635)]/40
x = [45 +54.635] / 40 or [45-54.635]/40
x = 2.491 0r x = - 0.241
* is the same as x for multiplication. But because x is a variable it would be confusing to have both.4x+x-3-9+4*6 =4x+x-3-9+24 =5x-3-9+24 =5x+12 5x and 12 cannot be added because they are not like terms.
x2+4x-9 = 5x+3 x2+4x-5x-9-3 = 0 x2-x-12 = 0 (x+3)(x-4) = 0 x = -3 or x = 4
Assuming that's -4x - 5x + 9, the answer would be x =1As -4x - 5x + 9 = 0Making it 9 = 5x + 4x, or 9 = 9x, cancel out the 9's, making x = 1.If it's -4x - 5 x 9, the answer would x = 11.25As -4x - 5 x 9 = 0Making it 45 = 4x, divide the 45/4, which would give you 11.25.
5x+12 = 4x-88 x = -100
x2 + 4x - 9 = 5x + 3 ∴ x2 - x - 12 = 0 ∴ (x + 3)(x - 4) = 0 ∴ x ∈ {-3, 4}
-5x + x + 9 = -4x + 12 -4x + 9 = -4x + 12 9 = 12 This equation has no solution.
5x - 9 = 4x 5x - 4x - 9 = 4x - 4x x - 9 = 0 x - 9 + 9 = 0 + 9 x = 9
5x = 4x + 9 x = 9
* is the same as x for multiplication. But because x is a variable it would be confusing to have both.4x+x-3-9+4*6 =4x+x-3-9+24 =5x-3-9+24 =5x+12 5x and 12 cannot be added because they are not like terms.
x2+4x-9 = 5x+3 x2+4x-5x-9-3 = 0 x2-x-12 = 0 (x+3)(x-4) = 0 x = -3 or x = 4
Assuming that's -4x - 5x + 9, the answer would be x =1As -4x - 5x + 9 = 0Making it 9 = 5x + 4x, or 9 = 9x, cancel out the 9's, making x = 1.If it's -4x - 5 x 9, the answer would x = 11.25As -4x - 5 x 9 = 0Making it 45 = 4x, divide the 45/4, which would give you 11.25.
5x+12 = 4x-88 x = -100
4x+12-5x-30=-x-18
x2 + 4x - 9 = 5x + 3 ∴ x2 - x - 12 = 0 ∴ (x + 3)(x - 4) = 0 ∴ x ∈ {-3, 4}
5x + 14 = 95 - 4x 5x + 4x = 95 - 14 9x = 81 x = 81/9 x = 9
4x-9(x plus 1)7-5x?
B - 4x = 5x Add 4x to both sides B = 9x Divide both sides by 9 B/9 = x