Question

11. Frankie solved the equation below. Describe Frankie's mistake and record the correct

solution.
2.3x3.9 +1.2x - 4.6=2
3.5x8.5=2
3.5x = 10.5
x = 7

Answer 1

Answer: frankie did not rearrange like terms then simplify and divide

so x = 3

Explanation:

2.3x-3.9+1.2x-4.6=2 (rearrange like terms)

2.3x +1.2x-4.6-3.9=2

3.5x-8.5=2 (simplify)

+8.5 +8.5 (then add 8.5 to both sides)

3.5x= 10.5 then divide by 3.5

___ ___

3.5 3.5

x = 3 answer