Question

What value of n makes the equation true? 0.7n+0.8n=2.1 n=1.40 n=3.60 n=3.15 n=0.60

Answer 1

0.7n+0.8n=2.1
1.5n=2.1
Divide both by 3 and you get:
0.5n=0.7
Multiply by 2:
n=1.4
Therefore the answer is the first one: n=1.40

Hope this helps :)

Answer 2

The answer would be A) n= 1.40.