Question

- 3 (2x + 7) + (-5x + 6) – 8 (1 – 2x) – (x – 3) = 0
-7 (18 + x) + 6 (-6 + 5x) = (- 7x - 9) + 3 (-2x - 5) + 12

4x – 9x + 2 = 7x – 5x – 9

3x – 8x + 9x = 12 - 7x

3x + (2x – 3) = 7 (x – 2) - x

Answer 1

Respuesta:

1.x=5

2.$x=\frac{25}{36}$

3.$x=\frac{11}{7}$

4.$x=\frac{12}{11}$

5.x=11

Explicación paso a paso:

1.

-3(2x+7)+(-5x+6)-8(1-2x)-(x-3)=0

-3(2x+7)-5x+6-8(1-2x)-(x-3)=0

-3(2x+7)-5x+6-8(1-2x)-(x-3)-6=0-6

-3(2x+7)-5x-8(1-2x)-(x-3)=-6

4x-26=-6

4x-26+26=-6+26

4x=20

$\frac{4x}{4} =\frac{20}{4}$

x=5

2.

-7(18+x)+6(-6+5x)=(-7x-9)+3(-2x-5)+12

-7(18+x)+6(-6+5x=-7x-9+3(-2x-5)+12

se desarrolla:-7(18+x)+6(-6+5x)=23x-162

se desarrolla:-7x-9+3(-2x-5)+12=-13x-12

23x-162=-13x-12

23x-162+162=-13x-12+162

23x=-13x+150

23x+13x=-13x+150+13x

36x=150

$\frac{36x}{36} =\frac{150}{36}$

$x=\frac{25}{36}$

3.

4x-9x+2=7x-5x-9

-5x+2=x-5x-9

-5x+2=2x-9

-5+2-2=2x-9-2

-5=2x-11

-5x-2x=2x-11-2x

-7x=-11

$\frac{-7x}{-7}= \frac{-11}{-7}\\x=\frac{11}{7}$

4.3x-8x+9x=12-7x

4x=12-7x

4x+7x=12-7x+7x

11=12

$\frac{11x}{11} =\frac{12}{11} \\x=\frac{12}{11}$

5.

3x+(2x-3)=7(x-2)-x

3x+2x-3=7(x-2)-x

se desarrolla:7(x-2)-x = 6x-14

5x-3=6x-14

5x-3+3=6x-14+3

5x=6x-11

5x-6x=6x-11-6x

-x=-11

$\frac{-x}{-1} =\frac{-11}{-1}$

x=11

espero te ayude, dame coronita plis :)