Question

1)-3x+8=2x+12

2)x+3-7=-x+4

3)8x-8=2x+12

4)x/2+8=3x/8+6

5)3x/3+5/9=2x/3+24


Por favorr mim ajuda!

Answer 1

Resposta:

1)-3X-8=2X+12

-3X-8-2X=2X+12-2X

-3X-8-2x=12

-3x2x-12+8

-3X-2x

(-3-2)x

-5x

-5x=12+8

-5x=20

-5x÷(-5)=20÷(-5)

x=20÷(-5)

x=-20÷5

x÷-4

2)x+3-7=x+4

3-7=4

3-7

-(7-3)

-4

4=4

3)8x-8=2x+12

8x-8-2x=2x+12-2x

8x-8-2x=12

8x-2x=12+8

6x=20

6x÷6=20÷6

x=20÷6

x=20/6

x=10/3

4)x/2+8=3x/8+6

x/2+8=3x/5+6

10 (x+8) =10 (3x+6)

2 5

10x x/2 +10x8=10(3x/5 +6)

10x x/2 +10x8=10 3x/5 +10x6

5x+10x8=10x 3x/5+10x6

5x+80=10x 3x/5+10x6

5x+80=2x3x+10x6

5x+80=2x3x+60

5x+80=6x+60

5x+80-6x=6x=6x+60-6x

5x+80-6x=60

5x-6x=60-80

5x-6x

(5-6)x

-1x

-x

-x=60-80

-x=-20

x=20

5)3x/3+5/9=2x/3+24

x+5/9=2x x/3+24

x+5/9=2x/3+24

9(x+5)=9(2x+24

9. 3

5x+9x5/9=9 (2x/3+24)

9x+9x5/9=9x2x/3+9x24

9x+5=9x2x/3+9x24

9x+5=3x2x+9x24

9x+5=3x2x+216

9x+5=6x+216

9x+5-6x=6x e 216-6x

9x+5-6x=216

9x-6x=216-5

9x-6x

(9-6)x

3x

3x=216-5. x=211/3