Question

cine ma poate ajuta la ecuatiile in multimea z 2x+16 = -7x +20; 15x+50=3x-46; -10x+13= -3x+90; 3x+9+12x=6x-9 va rog frumos spunetimi

Answer 1

1) 2x+16=-7x+20 |-16
   2x=-7x+4 |+7x
   9x=4
   x=4 pe 9
2)15x+50=3x-46 |+46
   15x+96=3x |-3x
12x+96=0 |-96
12x=-96
x=-8
3)-10x+13=-3x+90 |-10x
13=7x+90 |-13
0=7x+77 |-77
7x=-77
x=-11
4)3x+9+12x=6x-9 |+9
15x+18=6x |-6x
9x+18=0 |-18
9x=-18
x=-2
sper ca te-am ajutat :)))
 

Answer 2

1. 2x+7x=20-16
9x=4
x=9÷4

2. 15x-3x=-46-50
12x=-96
x=-96/12
x=-8

3. -10x+3x=90-13
-7x=77
x=77÷(-7)
x=11

4. 3x-6x=-9-9
-3x=-18
x=-18÷(-3)
x=6