Question

Rezolvatii ecuatiile
3x-5=x+21
14x-3=3x+41
8x+5=3x+10
8x-3=3x+42
5x+8=2x+35
8x+3=3x+28
4x+9=x+51
13x+11=4x+92
7x-3=3x+41
3(x+4)=x+12
5(x-1)=2x+7

Answer 1

3x-5=x+21
2x=26
x=13

14x-3=3x+41
11x=44
x=4

8x+5=3x+10
5x=5
x=1

8x-3=3x+42
5x=45
x=9

5x+8=2x+35
3x=27
x=9

8x+3=3x+28
5x=25
x=5

4x+9=x+51
3x=42
x=14

13x+11=4x+92
9x=81
x=9

7x-3=3x+41
4x=44
x=11

3(x+4)=x+12
3x+12=x+12
3x=x
x=0

5(x-1)=2x+7
5x-5=2x+7
3x=12
x=4

Answer 2

3x - 5 = x + 21
3x - x = 21 + 5
2x = 26
x = 26 : 2
x = 13

14 x - 3= 3x + 41
14 x - 3x = 41 + 3
11 x = 44
x = 44 : 11
x = 4

8x + 5 = 3x + 10
8x - 3x = 10 - 5
5x = 5
x = 5 : 5
x = 1

8x - 3 = 3x + 42
8x - 3x = 42 + 3
5x = 45
x = 45 : 5
x = 9

5x + 8 = 2x + 35
5x - 2x = 35 - 8
3x = 27
x = 27 : 3
x = 9

8x + 3 = 3x + 28
8x - 3x = 28 - 3
5x = 25
x = 25 : 5
x = 5

4x + 9 = x + 51
4x - x = 51 - 9
3x = 42
x = 42 : 3
x = 14

13 x + 11 =4x + 92
13 x - 4x = 92 - 11
9 x =81
x = 81 : 9
x = 9

7x - 3 = 3x + 41
7x - 3x = 41 + 3
4 x = 44
x = 44 : 4
x = 11

3 ( x + 4 ) = x + 12
3x + 12 = x + 12
3x - x = 12 - 12
2x = 0
x = 0

5 ( x - 1 ) = 2x + 7
5x - 5 = 2x + 7
5x - 2x = 7 +5
3x = 12
x = 12 : 3
x = 4