Question

Rezolvati ecuatiile :
4x+3(x+4)=5(x-1)-6(x+3)+11
6(x+3)-7(x+5)=4(x+1)-2(x+6)+12
2(5x-6)-3(4x-7)=21-4(2x-5)
3(2x-5)+4(x-7)=3(4x+11)-85
2(2x-1)-3(x-5)=5x-3(2x-7)+8
4(3x+4)-2(5x-9)=3x-2(x-7)+10
6(3x-8)+2(5x-9)=3x-2(x-6)+10
5(2x-7)-3(3x-8)=9x-2(3x-5)+13
3(4x-11)+5(7-2x)=16-3(3x-10)

Answer 1

4x + 3 (x + 4) = 5(x - 1) - 6(x + 3) + 11
4x + 3x + 12 = 5x - 5 - 6x - 18 + 11
4x + 3x - 5x + 6x = - 12 - 5 - 18 + 11
8x = - 24
x = - 3
6(x + 3) - 7(x + 5) = 4(x + 1) - 2(x + 6) + 12
6x + 18 - 7x - 35 = 4x + 4 - 2x - 12 + 12
6x - 7x - 4x + 2x = - 18 + 35 + 4 - 12 + 12
- 5x = 21
x = - 21/5
2(5x - 6) - 3(4x - 7) = 21 - 4(2x - 5)
10x - 12 - 12x + 21 = 21 - 8x + 20
10x - 12x + 8x = 12 - 21 + 21 + 20
6x = 32
x = 32/6 = 16/3
3(2x - 5) + 4(x - 7) = 3(4x + 11) - 85
6x - 15 + 4x - 21 = 12x + 33 - 85
6x + 4x - 12x = 15 + 21 + 33 - 85
- 2x = - 16
x = 8
2(2x - 1) - 3(x - 5) = 5x - 3(2x - 7) + 8
4x - 2 - 3x + 15 = 5x - 6x + 21 + 8
4x - 3x - 5x + 6x = 2 - 15 + 21 + 8
2x = 16
x = 8
4(3x + 4) - 2(5x - 9) = 3x - 2x + 14 + 10
12x + 16 - 10x + 18 = 3x - 2x + 14 + 10
12x - 10x - 3x + 2x = - 16 - 18 + 14 + 10
x = - 10
6(3x - 8) + 2(5x - 9) = 3x - 2(x - 6) + 10
18x - 48 + 10x - 18 = 3x - 2x + 12 + 10
18x + 10x - 3x + 2x = 48 + 18 + 12 + 10
27x = 88
x = 88/27
5(2x - 7) - 3(3x - 8) = 9x - 2(3x - 5) + 13
10x - 35 - 9x + 24 = 9x - 6x + 10 + 13
10x - 9x - 9x + 6x = 35 - 24 + 10 + 13
16x = 34
x = 34/16 = 17/8
3(4x - 11) + 5(7 - 2x) = 16 - 3(3x - 10)
12x - 33 + 35 - 10x = 16 - 9x + 30
12x - 10x + 9x = 33 - 35 + 16 + 30 
11x = 44
x = 4