Y=-0.5x+3
y=-1
-1=-0.5x+3
-4=-0.5x
x=8
Ответ x=8
1)4:2=2(м)
2)4+4+2+2=12(м)
ответ:12 метров
\frac{100}{45} \frac{1}{4} +3/4х)=25/36
100*1 / 45*4 + 100*3 / 45*4х=25/36
25/45+75/15х=25/36
75/15х=-25/45+25/36
75/15х=-100/180 + 125/180
75/15х= \frac{25}{180}
х=\frac{25}{180} / \frac{75}{15}
дальше сам
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Ответ: ГЕПАРД