a) 18x-43 = 65

18x = 65+43

18x = 108

x = 108/18

x = 6

b) 23b-16 = 17b

23b-17b = 16

6x = 16

x = 16/6, simplificando

x = 8/3

c) 10y-5(1+y) = 3(2y-2)-20

10y-5-5y = 6y-6-20

10y-5y-6y = -6-20+5

-y = -21

y = 21

d) x(x+4)+x(x+2) = 2x²+12

x²+4x+x²+2x = 2x²+12

x²+x²-2x²+4x+2x = 12

6x = 12

x = 12/6

x = 2

e) (m-5)+(1-2m)5 = (3-m)4

m-5+5-10m = 12-4m

m-10m+4m = 12

-5m = 12

m = -12/5

f) 4n(n+6)-n² = 5n²

4n²+24-n²-5n² = 0

-2n²+24 = 0

-2n(n-12) = 0

-2n = 0

n¹ = 0

n-12 = 0

n² = 12

S = {0,12}

♥️♥️ Boa Semana

12/11/23