Question

varog ajutatima. urgent rezolvati ecuatiile:
a)3x+4x=28; b)5x+x-2x=36; c)2x+3=x+8; d)3x-2=x+12; e)7x+3x+9=5x+34; f)9x-4x+11=3x-x+44.
va rog

Answer 1

1)3x+4x=28
7x=28
X=28:7=4
V:3x4+4x4=28
2)5x+x-2x=36
6x-2x=36
4x=36
X=36:4=9
3)2x+3=x+8
2x-x=8-3
X=5
4)3x-2=x+12 ești sigură că nu e 3x+2?
5)7x+3x+9=5x+34
10x+9=5x+34
10x-5x=34-9
5x=25
X=5
6)9x-4x+11=3x-x+44
5x+11=2x+44
5x-2x=44-11
3x=33
X=11