oblicz rownania :
a)x+5=10
b) 2x +3 =15
c) 5x+ 13= 23
e)-x +5=2
f)-2x-7=11
a) x=10-5
x=5
b)2x=15-3
2x=12/:2
x=6
c)5x=23-13
5x=10/:5
x=2
e)-x=2-5
-x=-3/:-1
x=3
f)-2x=11-7
-2x=4/:-2
x=-2
szymon8 ma źle
x=-5+10
2x=-3+15
5x=-13+23
-x=-5+2
-x=-3
-2x=7+11
-2x=18/:2
-x=9
x=9
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a) x=10-5
x=5
b)2x=15-3
2x=12/:2
x=6
c)5x=23-13
5x=10/:5
x=2
e)-x=2-5
-x=-3/:-1
x=3
f)-2x=11-7
-2x=4/:-2
x=-2
szymon8 ma źle
a)x+5=10
x=-5+10
x=5
b) 2x +3 =15
2x=-3+15
2x=12/:2
x=6
c) 5x+ 13= 23
5x=-13+23
5x=10/:5
x=2
e)-x +5=2
-x=-5+2
-x=-3
x=3
f)-2x-7=11
-2x=7+11
-2x=18/:2
-x=9
x=9