Question

What is the value of x in the equation below? Round to the nearest hundredths place.


`0.45 (x +1.6) + 5x =18`

A. 3.01
B. 3.17
C. 36.44
D. 38.40

Answer 1

0.45(x+1.6)+5x = 18

Expanding 0.45x+0.45*1.6+5x = 18

Regrouping 0.45x+5x = 18-0.45*1.6

So 5.45x = 18-0.72
x = 17.28/5.45 = 3.17

Ans is B

Answer 2

0.45(x + 1.6) + 5x = 18
0.45x + 0.72 + 5x = 18
5.45x = 18 - 0.72 = 17.28
x = 17.28 / 5.45

x = 3.17 answer