Xiao Ming has read 86 pages of a science book and has 74 pages left. How many pages are there in this science book? (First list the equations containing the unknown x, and then solve them)
小明读一本科技书，已经读了86页，还有74页没有读完，这本科技书有多少页？(先列出含有未知数x的等式，再解答)
<gadget id="calculator">74 + 86</gadget>
<output>160</output>

<result>160</result>