Question

Am ne voie de rezolvari
x+6=14
2x+3=5x+9
3x-5=4-2x
6x+8=9+x
2x+2=8x+4
3/x=4/2
3/x=6/y stiind x/y =2/3
x/2=3/ystiind x/y=2
x/y=2/3 calculeaza 3x+y/4y=
x/y=5/4 calculeaza 7x+5y/5y=

Answer 1

x+6=14
x=14-6
x=8

2x+3=5x+9
2x-5x=9-3
-3x=6
x=6: (-3)
x= 2

3x-5=4-2x
3x+2x=4+5
5x=9
x=9:5
x=1,8

6x+8=9+x
6x-x=9-8
5x=1
x=1:5
x=0,2

2x+2=8x+4
2x-8x=4-2
-6x=2
x= 2: (-6)
x= 0,3(3)

3/x=4/2
x= 3•2/4
x=3/2
x=1,5

3/x=6/y
adică 3/6=x/y => 3/6=2/3

x/y=2/3
x/2=y/3=k=> x=2k ; y=3k
3x+y/4y = 3•2k + 3k/4•3k
=6k +3k/12k
=9k /12k
= 3/4

x/y=5/4
x/5=y/4=k=> x=5k; y=4k
7x+5y/5y = 35k+20k/ 20k
= 55k/20k
=11/4