Question

Use multiplcation to solve the proportion. a/40 = 3/10​

Answer 1

a=12

Explanation:

a/40=3/10

10 x 4=40, so

3 x 4=12

a=12

Answer 2

`\boxed{\sf{x=12}}`

Explanation:

Isolate the term of a from one side of the equation.

Solution: Multiplication property of equation.

a/40=3/10

First, multiply by 10 from both sides.

`\sf{(a)/(40)\cdot \:10=(3)/(10)\cdot \:10}`

Solve.

a/4=3

Then, multiply by 4 from both sides.

4a/4=3*4

Solve.

3*4=12

a=12

As a result, the correct answer is a=12.

I hope this helps you! Let me know if my answer is wrong or not.