Question

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

Answer 1

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