Question

por favor me ajudem a resolver essas questões com a conta
a:7x+8=-2x-15
b:x+6=-2x-15
c:5x-10=+3x+8
d:-x+24=-4x+30
e:21=-2x-21
f:12x-80=+2x-100​

Answer 1

Explicação passo-a-passo:

a: 7x+8=-2x-15

7x+2x=-15-8

9x=-23

x=-23/9

b: x+6=-2x-15

x+2x=-15-6

3x=-21

x=-21/3

x=-7

c: 5x-10=+3x+8

5x-3x=8+10

2x=18

x=18/2

x=9

d: -x+24=-4x+30

-x+4x=30-24

3x=6

x=6/3

x=2

e: 21=-2x-21

2x=-21-21

2x=-42

x=-42/2

x=-21

f: 12x-80=+2x-100

12x-2x=-100+80

10x=-20

x=-20/10

x=-2