Rozwiąż podane równania:
a) 4x-9 = 6x+5
b) 4x-9 = 2x-13
c) 4x-9 = 5x-8
d) 2x-1 = 20-5x
e) 27x+3 = 5+20x
f) 3*(2x+5) = 10x+1
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a)
4x-9 = 6x+5
-2x=14 |:(-2)
x=-7
b)
4x-9 = 2x-13
2x=-4 |:2
x=-2
c)
4x-9 = 5x-8
-x=1 |:(-1)
x=-1
d)
2x-1 = 20-5x
7x=21 |:7
x=3
e)
27x+3 = 5+20x
7x=2 |:7
x=2/7
f)
3*(2x+5) = 10x+1
6x+15=10x+1
-4x=-14 |:(-4)
x=3,5
a)4x-6x=5+9
-2x=14/:-2
x=7
b)4x-2x=-13+9
2x=-4/:2
x=-2
c)
4x-9 = 5x-8
-x=1 |:(-1)
x=-1
d)
7x=21 |:7
x=3
e)27x+3 = 5+20x
7x=2 |:7
x=2/7
f)3 * (2x+5) = 10x+1
6x+15=10x+1
-4x=-14 |:(-4)
x=3,5