Question

If 10x + 2 = 7, what is the value of 2x?

Answer 1

For this case we have the following equation:

$10x + 2 = 7$

From here, we clear the value of x.

We have then:

$10x = 7-2\\10x = 5\\x = \frac {5} {10}\\x = \frac {1} {2}$

Then, we look for the value of 2x. We have then:

$2x = 2 \frac {1} {2}\\2x = \frac {2} {2}\\2x = 1$

Answer:

The value of 2x is given by:

$2x = 1$

Answer 2

10x+2=7
10x=5
x=1/2
2(1/2)=1