Answer:
The earning by washing four cars is $20
Step-by-step explanation:
You earn $35 for washing 7 cars.
The following steps can be used in order to determine the earning by washing four cars:
Step 1 - The unitary method can be used in order to determine the earning by washing four cars.
Step 2 - According to the given data, the earning by washing seven cars is $35.
Step 3 - So, the earning for washing four cars is given by:
4/7 x 35
Step 4 - Simplify the above expression.
140/7
= $20
So, the earning by washing four cars is $20.
