Question

resolva as equações a) 6x=2x+16 b)2x-5=x+1 c)2x+5-5x=-1 d)5x-3+x=2x+9 e)5x+6x-16=3x+2x-4 f)x+2x-1-3=x​

Answer 1

Resposta:

Letra A) x = 4

$6x=2x+16\\(-2x)+6x = 16\\4x = 16\\x = \frac{16}{4} = 4$

Letra B) x = 6

$2x-5=x+1\\2x-x = 1+5\\x = 6$

Letra C) x = 2

$2x+5-5x=(-1)\\2x-5x=(-1)-5\\-3x = -6 (*-1)\\x = \frac{6}{3} = 2$

Letra D) x = 3

$5x-3+x=2x+9\\6x =2x+9+3\\(-2x) +6x =12\\x = \frac{12}{4} = 3$

Letra E) x = 2

$5x+6x-16=3x+2x-4\\11x-16=5x-4\\11x-5x=16 +(-4)\\6x = 12\\x = \frac{12}{6} = 2$

Letra F) x = -2

$x+2x-1-3=x\\3x-1-3=x\\2x = -4\\x = \frac{-4}{2} = -2$