Question

Alguém me passa as resposta dessas equação por favor

Answer 1

Vamos la na segunda questao:

13x-23-45=-7+12

13x+7=12+23+45

20x=80

X=80÷20

X=4

Answer 2

2)13x - 23 - 45 = -7x + 12

13x + −23 + −45 = −7x + 12

(13x) + (−23 + −45) = −7x + 12

13x + −68 = −7x + 12

13x − 68 = −7x + 12

13x − 68 + 7x = −7x + 12 + 7x

20x − 68 = 12

20x − 68 + 68 = 12 + 68

20x = 80

80/20

x = 4

4)19 + 2x - 13 = 10 - 20

19 + 2x + −13 = 10 + −20

(2x) + (19 + −13) = (10 + −20)

2x + 6 = −10

2x + 6 − 6 = −10 − 6

2x = −16

-16/2

x = -8

5)

a)2x + 4 = 4x - 8

2x + 4 − 4x = 4x − 8 − 4x

−2x + 4 = −8

−2x + 4 − 4 = − 8 − 4

−2x = −12

-12/-2

x = 6

b)3x + 4 = -2x - 11

3x + 4 + 2x = −2x − 11 + 2x

5x + 4 = −11

5x + 4 − 4 = − 11 − 4

5x = −15

-15/5

x = -3