;D pilnee !! ^^ z góry dzięki :D
oblicz równania i sprawdź:
1)2 1/2: x = 10
2)13-x=4 1/5
3)x-2 1//2=8
4)16*b= 32
* -* ;D
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1)2 1/2: x = 10
5/2:x=10/*2/5
x=20/5
x=4
2)13-x=4 1/5
-x=4 1/5-13
-x=-8 4/5/*(-1)
x=8 4/5
3)x-2 1//2=8
x=8+2 1/2
x=10 1/2
4)16*b= 32/:16
b=2
1)
2 1/2: x = 10 /*x
2 1/2=10x /:10
x=2 1/2:10
x=5/2*10
x=5/2*1/10
x=1/4
spr.
2 1/2:1/4=10
5/2:1/4=10
5/2*4/1=10
20/2=10
10=10
2)
13-x=4 1/5
-x=4 1/5-13
-x=4,2-13
-x=-8,8 /:(-1)
x=8,8
spr.
13-8,8=4 1/5 => (4 1/5)=21/5=4,2)
4,2=4,2
3)
x-2 1//2=8
x=8+2 1/2
x=10 1/2
spr.
10 1/2-2 1/2=8
8=8
4)
16*b= 32
16b=32 /:16
x=2
spr.
16*2=32
32=32