Question

Buna ziua tuturor ajutati-ma va rog mult sa rezolv citeva ecuatii!
a) 30x +9-25x=2x+21
 b)2x -4+3x+10=x+30
c) 4(x+3)+2(2x-2)=5x+14
d) 5(x-2)-2(x-2)=72
Ajutati-ma va rog frumos dau multe puncte!!

Answer 1

5x+9=2x+21
3x=12
x=4
b) 5x-x=30+4-10
4x=24
x=6
c) 4x+12+4x-4=5x+14
8x-5x=14-12+4
3x=6
x=2
d) 5x-10-2x+4=72+10-4
3x=78
x=26

Answer 2

a) 30x - 25x - 2x = 21 - 9
3x = 12
x = 12 : 3
x = 4
b) 2x + 3x - x = 4 - 10 + 30
4x = 24
x = 24 : 4
x = 6
c) 4x + 12 + 4x - 4 = 5x + 14
4x + 4x - 5x = 4 - 12 + 14
3x = 6
x = 6 : 3
x = 2
d) 5x - 10 - 2x + 4 = 72
3x = 72 + 10 - 4
3x = 78
x = 78 : 3
x = 26