Rozwiąż równania :
1. 1/4x-(4+1/2x)=-2
2. 2(3-x)-4(x-5)=2x+2
3. 1/3*(-6x+9)-4=-5(x+1)
4. 0,2*(10-5x)=3+2(x-1)
5. 37=(20-4x) *0,5-7x
6. a/2+2+a/2=3
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1) 1/4x -(4+1/2x) = -2
1/4x -4 -1/2x = -2 /*4
x - 16 -2x = -8
x - 2x = -8 +16
-x = 8 /*(-1)
x = -8
2) 2(3-x) -4(x-5) = 2x +2
6 -2x -4x +20 = 2x +2
-2x -4x -2x = 2 -6 -20
- 8x = -24 /:(-8)
x = 3
3) 1/3 *(-6x +9) -4 = -5(x +1)
-2x + 3 -4 = -5x -5
-2x +5x = -5 -3 +4
3x = -4 /:3
x = -4/3
4) 0,2*(10-5x)= 3 +2(x-1)
2 - x = 3 +2x -2
-x -2x = 3 -2 -2
-3x = -1/:(-3)
x = 1/3
5) 37 = (20-4x)* 0,5- 7x
37 = 10 - 2x -7x
2x +7x = 10 - 37
9x = -27/:9
x = -3
6) a/2 +2 +a/2 = 3 /*2
a + 4 +a = 6
2a =6-4
2a = 2 /:2
a = 1
1)
¼x-4-½x=-2
-¼x=2
x=-8
2)
6 -2x -4x +20 = 2x +2
-2x -4x -2x = 2 -6 -20
- 8x = -24 /:(-8)
x = 3
3)
-2x + 3 -4 = -5x -5
-2x +5x = -5 -3 +4
3x = -4 /:3
x = -4/3
4)
2-x= 3+2x-2
-3x=-1
x=⅓
5)
37=10-2x-7x
27=-9x
x=3
6)
a/2+2+a/2=3
a/2+a/2=1
2a/2=1
2a=2
a=1