A] 2x+13=49
b] 2x+5=7
c] 25+12x=1021
d] 3x+4=19
e] 3x-21=45
f] 5x-23=72
i] 320-7x=243
te rogggggggg

1
a) 2x+13=49 |-13 2x=36 |:2 x=18.....b) 2x+5=7 |-5 2x=2 |:2 x=1.....c) 25+12x=1021 |-25 12x=996 |:12 x=83.….d) 3x+4=19 |-4 3x=15 |:3 x=5....
e) 3x-21=45 |+21 3x=66 |:3 x=22.....f) 5x-23=72 |+23 5x=95 |:5 x=19.....i) 320-7x=243 |-320 -7x=-77 |•(-1) 7x=77 x=11.....sper ca te-am ajutat :*
multumescccccc♥♥♥♥☻☻

Răspunsuri

2014-10-02T17:58:23+03:00
A)49-13=36
36:2=18
b)7-5=2
2:2=1
c)1021-25=996
996:12=83
d)19-4=15
15:3=5
e)45+21=66
66:3=22
f)72+23=95
95:5=19
g)320-243=77
77:7=1
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