Question

Zapisz w jak najprostszej postaci :
a) x+x x+3x 3/4x+x x+0,5x 1,2x+x
b) 5x+2x 3x+0,6x 2x+3/4x 3x+x/2 0,6x+1,2
c) x-1/2x x-1/3x x-3/4x x-0,6x x-0,85x
d) 5x-x 3x-0,5x 5x-2/5x 1,8x-1,2x 20x-10,5x
e) -5x+x -2x-3x 5x-(-x) -10x-(-x) x/2-x
prosze piszcie nie kumam tego!!;( potrzebne na 19;***

Answer 1

A) x+x = 2x
x+3x = 4x
3/4x+x 0,75x+x = 1,75x
x+0,5x = 1,5x
1,2x+x = 2,2x
b) 5x+2x = 7x
3x+0,6x = 3,6x
2x+3/4x = 2x+0,75x = 2,75x
3x+x/2 = 3x+0,5x=3,5x
0,6x+1,2x = 1,8x
c) x-1/2x = x-0,5x = 0,5x
x-1/3x = 3x/3 - x/3 = 2x/3
x-3/4x = x-0,75x = 0,25x
x-0,6x = 0,4x
x-0,85x = 0,15x
d) 5x-x = 4x
3x-0,5x = 2,5x
5x-2/5x = 5x-0,4x = 4,6x
1,8x-1,2x = 0,6x
20x-10,5x = 9,5x
e) -5x+x = -4x
-2x-3x = -5x
5x-(-x) = 5x+x = 6x
-10x-(-x) -10x+x = -9x
x/2-x = 0,5x-x = -0,5x