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wlad13 [49]
3 years ago
8

-3/4= 3a/7. What is it? I have no idea how to solve this.

Mathematics
1 answer:
Vsevolod [243]3 years ago
7 0

Answer:

\boxed{ \bold{ \huge{ \boxed{ \sf{a =  - 1.75}}}}}

Step-by-step explanation:

\sf{ \frac{ - 3}{4}  =  \frac{3a}{7} }

Do cross multiplication

\dashrightarrow{ \sf{3a \times 4 = 7 \times ( - 3)}}

\longrightarrow{ \sf{12a =  - 21}}

Divide both sides by 12

\longrightarrow{ \sf{ \frac{12a}{12}  =  \frac{ - 21}{12}}}

Calculate

\longrightarrow{ \sf{a =  - 1.75}}

Hope I helped!

Best regards! :D

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