2 câu trả lời
a) ${x:7=100+8}$
${x:7=108}$
${x=108×7}$
${x=756}$
b)
${x×7=357}$
${x=357:7}$
${x=51}$
$x:7=100+8$
$x:7=108$
$x=108×7$
$x=756$
·····················
$x×7=357$
$x=357:7$
$x=51$
a) ${x:7=100+8}$
${x:7=108}$
${x=108×7}$
${x=756}$
b)
${x×7=357}$
${x=357:7}$
${x=51}$
$x:7=100+8$
$x:7=108$
$x=108×7$
$x=756$
·····················
$x×7=357$
$x=357:7$
$x=51$