Помогите решить уравнения 2х-3(х+2)=3 5(х+1)+4х=3 -3-5(3х+2.5)=5.5

Question

Помогите решить уравнения
2х-3(х+2)=3
5(х+1)+4х=3
-3-5(3х+2.5)=5.5

Answer 1

1) 2x-3(x+2)=3
2x-3x-6=3
-x=9
x=-9
2)5(х+1)+4х=3
5x+5+4x=3
9x=-2
x=4 1/2= 4,5
3)-3-5(3х+2.5)=5.5
-3-15x-12.5=5.5
15x=15
x=1

Answer 2

2х-3(х+2)=3
2х-3х- 6= 3
2х-3х = 3+6
-1х = 9
х = 9÷(-1)
х = -9

5(х+1)+4х=3
5х +5 +4х =3
5х +4х = 3- 5
9х = -2
х = -2/9


-3-5(3х+2.5)=5.5
-3-15х-12,5= 5,5
-15х = 5,5+12,5+3
-15х = 21
х = - 21/15
х = -7/5 = -1 2/5