Question

Resolva as equações a seguir, sendo U=Q
a) 5x - 3 + x = 2x + 9
B)17x - 7x = x + 18
C)x - 4 = 17 - 2x + 1
( a D) e a E) ta na foto
F) 4x - 3 (2x + 1 ) = 8x + 1

Answer 1

Resposta:

$a) \\5x-3+x=2x+9\\6x-3=2x+9\\6x-2x=9+3\\4x=12\\x=\frac{12}{4} \\x=3\\\\b)\\17x-7x=x+18\\10x=x+18\\10x-x=18\\9x=18\\x=\frac{18}{9}\\x=2\\\\c)\\x-4=17-2x+1\\x-4=18-2x\\x+2x=18+4\\3x=22\\x=\frac{22}{3} \\ou\\x=7,3\\\\d)\\\frac{5x-7}{2} =\frac{1}{2} +x\\2.(\frac{5x-7}{2}) =2.(\frac{1}{2} +x)\\5x-7=1+2x\\5x-2x=1+7\\3x=8\\x=\frac{8}{3}\\ou\\x=2,6\\\\e)\\\frac{x-4}{3} =\frac{-x+49}{2} \\\\2(x-4)=3(-x+49)\\2x-8=-3x+147\\2x+3x=147+8\\5x=155\\x=\frac{155}{5} \\x=31$          

Cabou as linhas.