Question

4) resolva as equações do 1º grau,sendo U = Q

a) 4x - 3. ( 2- x ) = 64 + 2x

b) 2x - 3 ( 4 - x ) = 5 + 4 ( 2x + 1 )

c) 2x + 21 - 6x = - 12 + x - 7

URGENTE ULTIMA QUESTÃO POR FAVOR!!

Answer 1

$Ola$♡

a)

$4x - 3. ( 2- x ) = 64 + 2x\\4x-6+3x=64+2x\\7x-2x-6=64\\5x=64+6\\5x=70\\x=14$

b)

$2x - 3 ( 4 - x ) = 5 + 4 ( 2x + 1 )\\2x-12+3x=5+8x+4\\2x+3x-8x=5+4+12\\5x-8x=9+12\\-3=21\\x=-7$

c)

$2x + 21 - 6x = - 12 + x - 7\\2x-6x-x=-12-21-7\\-5x=-40\\x=8$

$Bons\ estudos\ e \ qualquer \ duvida,\ me \ chame!$