Question

alguém me ajuda por favor presiso disso urgente?​

Answer 1

Resposta: d) x=-30

$\frac{x+6}{x-6} =\frac{2}{3} \\x+6= \frac{2}{3} *(x-6)\\x+6=\frac{2x-12}{3} \\3x+18=2x-12\\-x=18+12 \\-x=30*(-1)\\x=-30$

e) x=7

$x+\frac{3}{2} =5x-30\\x+3=10x-60\\x+63=10x\\9x=63\\x=7$

f) $x=\frac{9}{2} \\\frac{\frac{3}{4} }{\frac{1}{3} } =\frac{\frac{1}{2} }{x} \\\frac{3}{4} *\frac{3}{1} = \frac{1}{2} x\\\frac{9}{4} =\frac{1}{2} x\\x= \frac{9}{4} * 2 = \frac{18}{4} x= \frac{9}{2}$