Question

preciso resolver essas duas equações
2x-4=4x-5/3

x-1/3+x+5/4=1/2

Answer 1

Resposta:

a) $x=\frac{7}{2} = 3\frac{1}{2}$

b) $x=-\frac{5}{7}$

Explicação passo-a-passo:

$a) \\2x-4=\frac{4x-5}{3}$

$3(2x-4)=4x-5\\\\6x-12=4x-5\\\\6x-4x=-5+12\\\\2x=7\\\\x=\frac{7}{2}=3\frac{1}{2}\\ \\\\b) \frac{(x-1)}{3}+\frac{(x+5)}{4}=\frac{1}{2}\\ \\\frac{4(x-1)+3(x+5)=6}{12}\\\\\frac{4x-4+3x+15=6}{12}\\\\7x=6+4-15\\x=-\frac{5}{7}$