Вычислите периметр квадрата, сторона которого равна: а) 1/4 м б) 1/4 дм в) 7/32 мг) 15/64 дм

<span>64+36:(x*3-15)=70</span>

<span>36:(x*3-15)=70-64</span>

<span>36:(x*3-15)=6</span>

<span>(x*3-15)=36:6</span>

<span>(x*3-15)=6</span>

<span>х*3=6+15</span>

<span>х*3=21</span>

<span>х=21:3</span>

<span>х=7</span>

<span>124-24*(480:x-56)=28</span>

<span>24*(480:x-56)=124-28</span>

<span>24*(480:x-56)=96</span>

<span>(480:x-56)=96:24</span>

<span>(480:x-56)=4</span>

<span>480:х=4+56</span>

<span>480:х=60</span>

<span>х=480:60</span>

<span>х=8</span>