Question

va rog cate puteti dintre astea 3

Answer 1

a)(15x-6-6x)/4=1=>9x-6=4=>9x=10=>x=10/9

b)18x-12+5=17x-2=>x=-2+7=>x=5

c)21/9x+7/6=6/9x+7/3=>21/9x-6/9x=7/3-7/6=>15/9x=7/6=>90x=63=>x=63/90=>x=7/10

Answer 2

a) 15x-6-6x=4
9x=6+4
9x=10, x=10/9
b) 6*3x-2*6+5=17x-2
18x-12+5=17x-2
18x-7=17x-2
18x-17=7-2
x=5
c) 2,(3)=2 întregi 3/9=2 întregi 1/3=7/3
1 întreg 1/6=7/6
0,(6)=6/9=2/3
7x/3+7/6=2x/3+7/3
7x/3-2x/3=7/3-7/6
5x/3=14/6-7/6
5x/3=7/6
7*3=5x*6
30x=21
x=21/30
x=7/10