1) -x+15=3x-14x+5-x+15=-11x+5 /+11x 10x+15= 5 /-1510x=-10 /:10x=-12) -x=-73x-6 /+73x72x=-6 /:612x=-1/:12x=-1/12 (jedna dwunasta)3) 10=4-2x /-46=-2x /:2-x=3 / *(-1) x=-3
a)
-x+15=3x-1
4x=16
x=4
b)
4x+5-x=-7
3x=-12
x=-4
c)
3x-6=12
3x=18
x=6
d)
4-2x=10
2x=-6
x=-3
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1) -x+15=3x-14x+5
-x+15=-11x+5 /+11x
10x+15= 5 /-15
10x=-10 /:10
x=-1
2) -x=-73x-6 /+73x
72x=-6 /:6
12x=-1/:12
x=-1/12 (jedna dwunasta)
3) 10=4-2x /-4
6=-2x /:2
-x=3 / *(-1)
x=-3
a)
-x+15=3x-1
4x=16
x=4
b)
4x+5-x=-7
3x=-12
x=-4
c)
3x-6=12
3x=18
x=6
d)
4-2x=10
2x=-6
x=-3