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Lilit [14]
3 years ago
8

A) 10s + 7t = 149 5s + 7t = 99

Mathematics
2 answers:
mestny [16]3 years ago
5 0

Answer:

s = \frac{149}{10} - \frac{7t}{10}

t = \frac{149}{10} -\frac{10s}{7}

Step-by-step explanation:

(Hope this helps can I pls have brainlist (crown)☺️)

sergeinik [125]3 years ago
5 0

10s + 7t = 149 \\ 10s + 7t +  - 7t = 149 +  - 7t \\ 10s =  - 7t + 149 \\  \frac{10s}{10}  =  \frac{ - 7t + 149}{10}  \\  \boxed{s =  \frac{ - 7}{10} t +  \frac{149}{10} }

____________________

5s+7t=99 \\ 5s+7t+−7t=99+−7t \\ 5s=−7t+99 \\  \frac{5s}{5}  =  \frac{ - 7 + 99}{5}  \\  \boxed{s =  \frac{ - 7}{5} t +  \frac{99}{5} }

correct me if I'm wrong.

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