Question

Resolva as seguintes equações do primeiro grau com uma incógnita.

Answer 1

Resposta:

a) 4x +2 = 38

$4x+2-38=0\\4x-36\\4x=36 :(4)\\x=9$

b) 9x = 6x + 12

$9x-6x-12=0\\3x-12=0\\3x=12:(3)\\x=4$

c) 5x - 1 = 3x + 11

$5x-1-3x-11=0\\2x-10=0\\2x=10:(2)\\x=5$

d) 2x + 8 = x + 13

$2x+8-x-13=0\\x-5=0\\x=5$

e) 18x = 65 + 43

$18x = 108\\\\x=\frac{108}{18} \\\\x=6$

a) 3 + x = 0

$x=-3$

b) 23x + 2 = 2

$23x+2-2=0\\23x=0\\\\x= 0$

c) 12 - 7 + 4x = 25

$5 + 4x - 25 = 0\\-2 0+4x=0\\4x+20=0 :(4)\\x = 5$

d) 5x - 3x = 30

$2x=30 : (2)\\x=15$