Question

Resolva as equações:

a) x² - 2x = 6 + x²
b) 10x + 2 = 5x - 18
c) 4(x-5) = 6(x + 8)
d) x-1 = x+2
---- ----
5 4
e) x - x-1 = 6-x
---- ---- -----
5 2 3

Answer 1

Explicação passo-a-passo:

a)x²-2x=6+x²

x²-x²-2x=6

-2x=6 (-1)

2x=6

x=6/2

x=3

b)10x+2=5x-18

10x-5x=-18-2

5x=-20

x=-20/5

x=-4

c)4(x-5)=6(x+8)

4x-20=6x+48

4x-6x=48+20

-2x=68(-1)

2x=-68

x=-68/2

x=-34