Zhuoma took a fancy to a pair of sneakers and a hat. The price of the sneakers was 90 yuan more expensive than the hat, and it was 7 times that of the hat. Please help Lele calculate how much it costs to buy this pair of sneakers and this hat? (Solution by equation).
卓玛看中了一双旅游鞋和一顶帽子，旅游鞋的价格比帽子贵90元，且是帽子的7倍．请你帮乐乐计算一下，购买这双旅游鞋和这顶帽子一共需要多少元？(用方程解)．
<gadget id="calculator">7 - 1</gadget>
<output>6</output>

<gadget id="calculator">90 / 6</gadget>
<output>15</output>

<gadget id="calculator">15 + 90 + 15</gadget>
<output>120</output>

<result>120</result>