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x= 10 - 5 ½
x= 4 ½
2x+3=15
2x= 15-3
2x= 12/÷2
x= 6
-5x+3=-1
x= -1-3+5
x= -4+5
x= 1
tego nie jestem pewna ale tak uważam
½y+3=7
y= 7-3- ½
y= 4-½
y= 3,5
x=10-5,5
x=4,5
2x+3=15
2x=15-3
2x=12 /:2
x=6
-5x+3= -1
-5x=-1-3
-5x=-4 /:(-5)
x=0,8
0,5y+3=7
0,5y=7-3
0,5y=4 /:0,5
y=8
x= -5 1/2 + 10
x= 15 i 1/2
b) 2x+3=15
2x = 15 - 3
2x = 12 /:2
x = 6
c) -5x+3 = -1
-5x = -1 - 3
-5x = -4 /:5
-x = -4/5 /.1
x - 4/5
d) 1/2 y + 3 = 7
1/2 y = 7 - 3
1/2 y = 4 /.2
y = 8
prościzna
. = razy
1/2 to jedna druga
5/5 to cztery piąte