סוג : 3 משוואות+שלבים.
tv=150↓t=150V{\displaystyle {\begin{aligned}&tv=150\\&\downarrow \\&\color {blue}t={\frac {150}{V}}\\\end{aligned}}}
2v+3a=150↓v=150−3a2{\displaystyle {\begin{aligned}&2v+3a=150\\&\downarrow \\&\color {blue}v={\frac {150-3a}{2}}\\\end{aligned}}}
(2t−32)a=150t=150V↓[2∗150v−3]a=300[300v−3]a=300v=150−3a2↓[2∗300150−3a−3]a=300[20050−a−3]a=300[200−3(50−a)]a=300(50−a)(200−150+3a)a=15,000−300a50a+3a2−15,000+300s=03a2+350a−15,000=0a=3;b=350;c=−15,000−350±3502+4∗3∗15,0002∗3a=3313;a=−↓v=150−3∗33132=25kmhr{\displaystyle {\begin{aligned}&({\frac {2t-3}{2}})a=150\\&\color {blue}t={\frac {150}{V}}\\&\downarrow \\&[2*{\frac {150}{v}}-3]a=300\\&[{\frac {300}{v}}-3]a=300\\&\color {blue}v={\frac {150-3a}{2}}\\&\downarrow \\&[{\frac {2*300}{150-3a}}-3]a=300\\&[{\frac {200}{50-a}}-3]a=300\\&[200-3(50-a)]a=300(50-a)\\&(200-150+3a)a=15,000-300a\\&50a+3a^{2}-15,000+300s=0\\&3a^{2}+350a-15,000=0\\&a=3;b=350;c=-15,000\\&{\frac {-350\pm {\sqrt {350^{2}+4*3*15,000}}}{2*3}}\\&a=33{\frac {1}{3}};a=-\\&\downarrow \\&v={\frac {150-3*33{\frac {1}{3}}}{2}}=25{\frac {km}{hr}}\\\end{aligned}}}