Question

Equação do 1 ° grau a) 4 x = 210-10 B)2x =20 C) x + 2 x + 6 = 45 D) 3 x - x = 9 - 7 E) 5 x + 3 x = 16 F) 3 x - 8 = 16 G) 9 x +3 = 30 H) x + x + 8 = 54

Answer 1

a) 4x = 210-10
4x=200
x=200/4 ---> x=50

b) 2x=20
x= 20/2 ----> x=10

c) x+2x+6=45
3x=45 - 6
3x=39
x=39/3 ---> x=13

d)3x-x= 9-7
  2x=2
x=2/2 ----> x=1

e)5x+3x=16
8x=16
x=16/8 ----> x=2

f) 3x-8=16
3x= 16+8
3x=24
x = 24/3 -----> x=8

g) 9x+3 =30
9x=30-3
9x=27
x=27/9 ----> x=3


h) x+x+8=54
2x=54-8
2x=46
x=46/2 ------> x=23