4
x=5. 10x-4x (6x) +10-6x (=10) If 10 is 2x, x=5.
5x + 32 = 11x - 105x - 11x = -10 - 32-6x = -42x = 7
4x+6x=30 is the same as: 10x=30 so we divide by 10 and get: x=3 (I do not see how this relates to calculus, but O.K.)
4x + 6 = 6x - 12-4x -4x6 = 2x - 12+12 +1218 = 2xx=9
3x - 12 = 10x - 15 - 6x -10 3x - 12 = 4x -25 3x + 13 = 4x 13 = 4x - 3x 13 = x None?
x=10
The lines are parallel.
negative one and a half
6x + 10 + 4x = 5010x + 10 = 5010x = 40x = 4
If 6x + 10 = 11x , then x=2.
Two straight lines that intersect.
10+12x=-14 -14-10=12x 12x=-24 x=-2
10
10
3x + 6x +1 = 10 9x = 10 - 1 9x = 9 x = 1
8x+2=6x+10 8x-6x=10-2 2x=8 x=4 Therefore, x=4.
5x+15 = 6x-10 5x-6x = -10-15 -x = -25 x = 25