From 12m to 18m (percent Increase)

50

Step-by-step explanation:

First, we can ignore the units since its the same unit.

We divide 18/12 and we get 1.5, which is also 150/100, so 18 is 150 percent of 12.

Since we are looking at the percent increase, the increase is 150 - 100 = 50

step-by-step :

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0