(c) in 2017, lauren's monthly income of $1800 was 25% less than her monthly income in 2016.
calculate her monthly income in 2016.
[2]marks

$2400

Step-by-step explanation:

Let her monthly income in 2016 be x. The equation is x-(25%×x)=1800

x-(25x/100)=1800

x-x/4=1800

4x-x=7200

3x=7200

x=7200/3

x=2400

Hope it helps

7k/3

Step-by-step explanation:

1.Expand.

4r-12k=r-5k

2.Add 12k to both sides.

4r=r-5k+12k

3. Simplify  r-5k+12k  to  r+7k.

4r=r+7k

4.Subtract r from both sides.

4r-r=7k

5.Simplify  4r-r  to  3r.

3r=7k

6.Divide both sides by 3.

r= 7k/3

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