Question

请高手帮忙求解出此题详细解题步骤[（X-40-20)×(1-20%)]÷800=[(X-40-45)×(1-20%)]÷

Answer 1

→[(X-60)×0.8]÷800=[(X-85)×0.8]÷700

→(0.8X-48)÷800=(0.8X-68)÷700

→(0.8X-48)×700=(0.8X-68)×800

→(0.8X-48)×7=(0.8X-68)×8

→5.6X-336=6.4X-544

→544-336=6.4X-5.6X

→208=0.8X

→260=X