Question

What makes the value n of the equation true -2n+1.8=3.2

A.-3.4
B.-0.7
C. 0.7
D.-2.5

Answer 1

-2n + 1.8 = 3.2
Subtract 1.8 from both sides
-2n = 1.4
Divide both sides by -2
n = 1.4/-2 = 0.7/-1 = -0.7
n = -0.7

Check your work:
-2(-0.7) + 1.8 = 3.2
1.4 + 1.8 = 3.2
3.2 = 3.2


The answer is B. -0.7