Question

hejo mam pracę domową z matematyki pomożecie.? ale bez wygłupów proszę bo bardzo mi to potrzebne.:D

a)2(x+3)-(5-x)+2=3-(x-1)
b)3(x-4)-2(3-2x)=-(3x-1)-(1-x)
c)2x-(x+4)-1=2-3(1-x)+3x
d)1-2(x-3)-(3x+5)=-x-(2x-1)+3
e)(x+2)+(x-3)-(4-x)=-(2x-5)-(3-x)+(2x-4)
f)2(1-x)+3(x+1)-(x-3)=(2x+3)-(4-x)-2(3-2x)

Answer 1

a)2(x+3)-(5-x)+2=3-(x-1)

2x + 6 - 5 +x + 2 = 3 - x + 1 

3x +3 = -x + 4

3x + x = 4-3

4x = 1

x=1/4

b)3(x-4)-2(3-2x)=-(3x-1)-(1-x)

3x-12-6+4x = -3x + 1 - 1 + x

7x - 18 = -2x 

7x + 2x = 18

9x = 18

x=2

c)2x-(x+4)-1=2-3(1-x)+3x

2x - x - 4 - 1 = 2 - 3 + 3x + 3x

x - 5 = 6x - 5

x - 6x = -5+5

-5x =0

x=0

d)1-2(x-3)-(3x+5)=-x-(2x-1)+3

1 - 2x + 6 - 3x - 5 = -x - 2x + 1 +3

-5x +2 = -3x + 4

-5x + 3x = 4-2

-2x = 2

x=-1

e)(x+2)+(x-3)-(4-x)=-(2x-5)-(3-x)+(2x-4)

x + 2 + x - 3 - 4 +x = 2x + 10 - 3 + x + 2x -4

3x -5 = 5x +3

3x - 5x = 3 + 5

-2x = 8

x=-4

f)2(1-x)+3(x+1)-(x-3)=(2x+3)-(4-x)-2(3-2x)

2 - 2x + 3x + 3 - x + 3 = 2x + 3 - 4 + x - 6 + 4x

4x +8 = 7x -7

4x - 7x = -7 - 8

-3x = - 15

x=5