Question

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Resolver as equações sendo U=Q.


1. 2x+3x+9=8(6-x)

2. 4(x+10)-2x-5)=0

3. 3(2x+3)-4(x-1)=3

4. 7(x-1)-2(x-5)=x-5)

5. 2(3-x)=3(x-4)+15

6. 3(5-X)-3(1-2x)=42​

Answer 1

Resposta:

1. $x=3$

2. $x=5$

3. $x=-5$

4. $x=-2$

5. $x=\frac{3}{5}$

6. $x=10$

Explicação passo a passo:

1. $2x+3x+9=8\left(6-x\right)$

$5x+9=8\left(6-x\right)$

$5x+9=48-8x$

$5x=-8x+39$

$13x=39$

$x=3$

2. $4\left(\left(x+10\right)-2x-5\right)=0$

$-x+5=0$

$-x=-5$

$x=5$

3. $3\left(2x+3\right)-4\left(x-1\right)=3$

$2x+13=3$

$2x=-10$

$x=-5$

4. $7\left(x-1\right)-2\left(x-5\right)=x-5$

$5x+3=x-5$

$5x=x-8$

$4x=-8$

$x=-2$

5. $2\left(3-x\right)=3\left(x-4\right)+15$

$6-2x=3x+3$

$-2x=3x-3$

$-5x=-3$

$x=\frac{3}{5}$

6. $3\left(5-x\right)-3\left(1-2x\right)=42$

$3x+12=42$

$3x=30$

$x=10$