7a-2b = 5a + b
2a=3b
a = 3b/2
Distribute the .25 to get .25x + 1 - 3 = 28
Then simplify to get .25x - 2 = 28
Move the two to the right to get .25x = 30
Then divide to leave x: 30 / .25 = 120
X = 120
It is 16 because 3x16=48 and 4x16=64!
A) is wrong because a measurable characteristics is called a basic