Question

(é equação de 1 grau com uma incógnita)

1) x-30=40

2)30-20+2x=10

3)3x-10+13=-2x+28

4)20x-30=40+30-20

5)5x+45-89=-90+41

6) 10x-20=40+50

7)20-80+2x=10

8)19+2x-13+10-20

9)10x-12+18=18-20

10)13x-23-45+-7x+12

Answer 1

Explicação passo-a-passo:

1) x=70

2)x=0

3)5x=25

x=5

4)20x=80

x=4

5)5x=5

x=5

6)10x=110

x=11

7)2x=70

x=35

8)2x=4

x=2

9)10x=-8

x=-8/10

x= -4/5

10)6x=56

x=56/6

x=28/3

espero ter ajudado!

ric

Answer 2

1)

$x-30=40 \\ x = 40 + 30 \\ x = 70$

2)

$30-20+2x=10 \\ 2x = 10 + 20 - 30 \\ 2x = 0 \\ x = \frac{0}{2} \\ x = 0$

3)

$3x-10+13=-2x+28 \\ 3x + 2x = 28 - 13 + 10 \\ 5x = 25 \\ x = \frac{25}{5} \\ x = 5$

4)

$20x-30=40+30-20 \\ 20x = 50 + 30 \\ 20x = 80 \\ x = \frac{80}{20} \\ x = 4$

5)

$5x+45-89=-90+41 \\ 5x = - 49 - 45 + 89 \\ 5x = - 5 \\ x = - \frac{5}{5} \\ x = - 1$

6)

$10x-20=40+50 \\ 10x = 90 + 20 \\ 10x = 110 \\ x = \frac{110}{10} \\ x = 11$

7)

$20-80+2x=10 \\ 2x = 10 + 60 \\ 2x = 70 \\ x = \frac{70}{2} \\ x = 35$

8)

$19+2x-13 = +10-20 \\ 2x + 6 = - 10 \\ 2x = - 10 - 6 \\ 2x = - 16 \\ x = - \frac{16}{2} = - 8$

9)

$10x-12+18=18-20 \\ 10x = - 2 - 6 \\ 10x = - 8 \\ x = - \frac{8}{10} = - \frac{4}{5}$

10)

$13x-23-45=-7x+12 \\13x + 7x = 12 + 23 + 45 \\ 20x = 80 \\ x = \frac{80}{20} \\ x = 4$