Question

PRECISO DO DESENVOLVIMENTO, AS RESPOSTAS EU SEI

Answer 1

Resposta:

d) 8

e) 2

f)$\frac{13}{7}$

Explicação passo-a-passo:

d)

$\frac{x}{8}+2=3\\ \frac{x}{8}=3-2\\\frac{x}{8}=1\\ \frac{x}{8}*8=1*8\\ \frac{8x}{8}=8\\x=8$

e)

$\frac{5x}{2}+3= \frac{3x}{2}+5\\ \frac{5x}{2}- \frac{3x}{2}=5-3\\ \frac{5x}{2} -\frac{3x}{2}=2\\ \frac{5x}{2}*2- \frac{3x}{2}*2=2*2\\ \frac{10x}{2}- \frac{6x}{2}=4\\ 5x-3x=4\\2x=4\\x=\frac{4}{2} \\x=2$

f)

$4x-\frac{3}{5}= \frac{x}{2}+5\\4x- \frac{x}{2}= 5+\frac{3}{5}\\4x*10- \frac{x}{2}*10=5*10+ \frac{3}{5}*10\\40x- \frac{10x}{2}= 50+\frac{30}{5}\\ 40x-5x=50+15\\35x=65\\x=\frac{65}{35}=\frac{13}{7}$