Question

Calcule as equações

c) 4x-10=20x+2

d) 10x-4=8x+20

e) 8x+11= -12x-9

f) 7x-2x=45+45

g) -4+5x=52-2x

Answer 1

Assunto: equaçao do primeiro grau.

c)

4x - 10 = 20x + 2

20x - 4x = -10 - 2

16x = -12

x = -12/16 = -3/4

d)

10x - 4 = 8x + 20

10x - 8x = 20 + 4

2x = 24

x = 12

e)

8x + 11 = -12x - 9

8x + 12x = -9 - 11

20x =  -20

x = -1

f)

7x - 2x = 45 + 45

5x = 90

x = 18

g)

-4 + 5x = 52 - 2x

5x + 2x = 52 + 4

7x = 56

x = 8