On Arbor Day, the fifth and sixth graders went to the mountain to plant trees. The fifth graders planted 150 trees, 30 trees less than 75% of the sixth graders. How many trees were planted by the sixth graders? (solution with equation)
植树节那天，五、六年级同学上山植树，五年级同学植树150棵，比六年级的75%还少30棵，六年级植树多少棵？(用方程解答)
<gadget id="calculator">150 + 30</gadget>
<output>180</output>

<gadget id="calculator">180 / 0.75</gadget>
<output>240</output>

<result>240</result>