Question

Prosze mi to rozpisac i dotego sprawdzenie!!! x:(-2i1/4)=4,5......to jest 1 rownanie 4x+5- x=(-7) do tad jest 2 rownanie -1(3x+1)+5x-2=1do tad jest 3 rownanie 3(x+2)+2x=4 to jest 4 sorka ale jestem na fonie dam NAJJJJ

Answer 1

x:(-2i1/4)=4,5

x = 4,5 * (-2 i 1/4)

x = 4,5 * (-2 i 1/4)

x = 4 i 1/2 * (- 9/4)

x = 9/2 * (-9/4)

x = -81/8 = -10 i 1/8

spr.  -81/8 : (-9/4) = -81/8 * (-4/9) = 9/2 = 4,5

 

4x+5 - x=(-7)

3x + 5 = -7

3x = -7 - 5

3x = -12

x = -12 : 3

x = -4

spr. 4 * (-4) + 5 - (-4) = -16 + 5 + 4 = -16 + 9 = -7

 

 -1(3x+1)+5x-2=1

-3x - 1 + 5x - 2 = 1

2x - 3 = 1

2x = 1 + 3

2x = 4

x = 2

spr. -1(3 * 2 + 1) + 5 * 2 - 2 = -1 * 7 + 10 - 2 = -7 + 8 = 1

 

3(x+2)+2x=4

3x + 6 + 2x = 4

5x = 4 - 6

5x = -2

x = -2/5

spr.  3(-2/5 + 2) + 2 * (-2/5) = 3 * 1 i 3/5 + (-4/5) = 3 * 8/5 + (-4/5) = 24/5 - 4/5 = 20/5 = 4