Question

resuelva quitando paréntesis:
1. 3(x-7)=5(x-1)-4
2. 5(2-x)+3(x+6)=10-4(6+2x)
3. 3x+8-5x-5=2(x+6)-7x
4. 10(x-2)=1

Answer 1

1.
3 ( x -7) = 5 ( x -1) -4
3x -21 = 5x -5 -4
-21 +5 +4 = 5x -3x
-12 = 2x
-12/2 = x
-6 = x
x = -6

2.
5 ( 2 -x) +3 ( x +6) = 10 -4 ( 6 +2x )
10 -5x +3x +18 = 10 -24 -8x
-5x +3x +8x = 10 -24 -10 -18
6x = -42
x = -42/6
x = -7

3.
3x +8 -5x- 5 = 2 ( x +6) -7x
3x +8 -5x -5 = 2x +12 -7x
3x -5x -2x +7x = 12 -8 +5
3x = 9
x = 9/3
x = 3

4.
10 ( x -2 ) = 1
10x -20 = 1
10x = 1 +20
10x = 21
x = 21/10

Answer 2

1: 3x-21=5x-5-4
3x-5x=21-9
-2x=12
x=12/-2
x=-6

2: 10-5x+3x+18=10-24-8x
-5x+3x+8x=-10-18+10
6x=-18
x=-18/6
x=-3

3: 3x-5x-2x-7x=-8+12
-11x=4
x=4/11

4: 10x - 20=1
10x=1+20
x=21/10
x=2.1

ESPERO TE AYUDE :)