Rozwiąż równania dokładnie :
-x-3=x-4
8,3-2x=0,5
1/2x=1/3x-1
1/2x+1/5x=1/10x=2
2(x+1)=4
3(2x+3)=x-1
x=1-3(x+1)
Na teraz ! ;D
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a)
-x-3=x-4
-2x = -1 /:(-2)
x = 0,5
b)
8,3-2x=0,5
-2x = -7,8 /:(-2)
x = 3,9
c)
1/2x=1/3x-1 /*6
3x = 2x - 6
x = -6
d)
1/2x+1/5x=1/10x=2 /*10
5x + 2x = x = 20
6x = -20 /:6
x = -10/3
e)
2(x+1)=4
2x + 2 = 4
2x = 2 /:2
x = 1
f)
3(2x+3)=x-1
6x + 9 = x - 1
5x = -10 /:5
x = -2
g)
x=1-3(x+1)
x = 1 -3x - 3
4x = -2 /:4
x = -0,5