Question

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

Answer 1

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

Explanation:

`\sf{ ( - 3)/(4) = (3a)/(7) }`

Do cross multiplication

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

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

Divide both sides by 12

`\longrightarrow{ \sf{ (12a)/(12) = ( - 21)/(12)}}`

Calculate

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

Hope I helped!

Best regards! :D