Question

Dada a equação 7x-5+x=15-2x, responda com conta?

Answer 1

Resposta:

$7x-5+x=15-2x\\\\\mathrm{Agrupar\:termos\:semelhantes}\\\\7x+x-5=15-2x\\\\\mathrm{Somar\:elementos\:similares:}\:7x+x=8x\\\\8x-5=15-2x\\\\\mathrm{Adicionar\:}5\mathrm{\:a\:ambos\:os\:lados}\\\\8x-5+5=15-2x+5\\\\\mathrm{Simplificar}\\\\8x=-2x+20\\\\\mathrm{Adicionar\:}2x\mathrm{\:a\:ambos\:os\:lados}\\\\8x+2x=-2x+20+2x\\\\\mathrm{Simplificar}\\\\10x=20\\\\\mathrm{Dividir\:ambos\:os\:lados\:por\:}10\\\\\frac{10x}{10}=\frac{20}{10}\\\\\mathrm{Simplificar}\\\\x=2$