Question

hola pe pueden ayudar con esto de mate
1- – x ( 4y+5y+6y)-4= x (-4y-5y-6y)
2- 10 ( 5x+6x+7x-8x)+4-3(x-1)= 3(x+1)-6(x+4x-5x)+8
3- 3(x-2x)+4(3x+5x)-4(2x+5x)-6=4x+12
4- 7(x-2x+8x)-5+6(5x+3x-4x)+9(8x+7x)+13=9(8x+4x+5x)-3(4x+8x)

Answer 1

1. -x*15y -4 = x*-15y

-15xy - 4 = -15xy

-15xy +15xy = 4

0 = 4

2. -10*10x + 4 -3x +3 = 3x + 3 -6x -24x +30x +8

-100x + 4 - 3x +3 = 3x + 3 -6x -24x +30x +8

-103x + 7 = 3x + 11

-103x - 3x = 11-7

-106x = 4

x = -2/53

3. -3x +6x + 12x + 20x - 8x - 20x - 6 = 4x + 12

7x - 6 = 4x + 12

3x = 18

x = 6

4. 7x - 14x + 56x - 5 + 30x +18x - 24x + 72x + 63x + 13 = 72x + 36x + 45x - 12x - 24x

208x + 8 = 117x

8 = 117x - 208x

8 = -91x

x = -8/91

Espero que te sirva.