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primary 6 | Maths | Percentage
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Nuna Nguyễn
Nuna Nguyễn

primary 6 chevron_right Maths chevron_right Percentage chevron_right Singapore

Pls help

Date Posted: 2 months ago
Views: 19
Edward Yang
Edward Yang
2 months ago
Let S represent Nina's salary.

She spent $2800 on a TV.

She also spent 6/10 * (S - $2800) on a sofa.

Then, she had 3/10 S left.

S - $2800 - 6/10 * (S - $2800) = 3/10 S

First, we expand out:

S - $2800 - 6/10 S + $1680 = 3/10 S

Shift the variables to one side:

7/10 S = $1120

Lastly, we multiply 10/7 on both sides:

S = $1600

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Phylicia Tong
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