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Temat:Rzwiązywanie równości
a) 2(x=1)=4+x
b) 4=2(x-1)-8x
c) 3(x-2)=x
d) 3(2x+3)=x-1
e) 4(x-1)=3(x+1)
f)x=1-3(x+1)
oraz zadania z ćwiczeń 14 str.24 i 16 str.25 MATEMATYKA Z PLUSEM WYDANIE NOWE!WYRAŻENIA ALGEBRAICZNE!!!!
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a) 2x+2=4+x |-x
x+2=4 |-2
x=2
b)4=2x-2-8x
4=-6x-2 |+2
6=-6x |:(-6)
-1=x
x=-1
c)3x-6=x |+6
3x=x+6 |-x
2x=6
d)6x+9=x-1 |-9
6x=x-10 |-x
5x=-10 |:5
x=-2
e)4x-4=3x+3 |-3x
x-4=3 |+4
x=7
f)x=1-3x-3
x=-2-3x |+3x
4x=-2 |:4
x=-0.5
a) 2(x+1)= 4+x
2x + 2 = 4 + x
2 x - x = 4 - 2
x = 2
b) 4 = 2(x-1)-8x
4 = 2x-2 - 8x
-2x + 8x = -2-4
6 x = -6/:6
x = -1
c) 3(x-2) = x
3x - 6 = x
3x-x = 6
2 x = 6/:2
x = 3
d) 3(2x+3) = x - 1
6x + 9 = x - 1
6x - x = -1 -9
5x = -10/:5
x = -2
e) 4(x-1) = 3(x+1)
4x - 4 = 3x + 3
4x -3x = 3+4
x = 7
f) x = 1-3(x+1)
x = 1-3x- 3
x+3x = 1-3
4x = -2 /:4
x = - 1/2