Which value of x makes the open sentence 4=10x true

.4

2.5

4

25

The answer for 4=10x is. 4

This is a linear equation.

We shall solve for x using reverse operations.

We know 10 x means 10 times x.

The reverse operation of times is division.

We have

4 = 10x

we can also write

10x = 4

Dividing by 10 on both sides we get

x = 4/10

x = 0.4

Hence the value of x = 0.4 makes the statement 4 = 10x true.

Option a) is the right answer.