Question

Nas figuras as retas r s t são paralelas. Determine o valor de x

Answer 1

Resposta:

$a)\\ {2x-1\over3x+4}={3\over6}\\ \\ 6(2x-1)=3(3x+4)\\ 12x-6=9x+12\\ 12x-9x=12+6\\ 3x=18\\ x=18\div3\\ \\ x=6\\ \\ b)\\ {2x+1\over5x-1}={4\over6}\\ \\ 4(5x-1)=6(2x+1)\\ 20x-4=12x+6\\ \\ 20x-12x=6+4\\ 8x=10\\ \\ x={10\over8}={5\over4}\mapsto1,25$