Answer:
and 
Step-by-step explanation:
Given


Required
Solve for x and y
Make x the subject in the second equation

Substitute 31 - 5y for x in 



Collect like terms


Solve for y


Substitute 6 for y in 



Answer:
<u>Eric earned last month US$ 9,786.25</u>
Step-by-step explanation:
Commission of Eric on each house sold = 5% = 0.05
House 1 $55,000
55,000 * 0.05 = $ 2,750
House 2 $105,525
105,525 * 0.05 = $ 5,276.25
House 3 $35,200
35,200 * 0.05 = $ 1,760
Eric earned last month = $ 2,750 + $ 5,276.25 + $ 1,760
<u>Eric earned last month US$ 9,786.25</u>
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So allison spent 3/5 meaning she saved 2/5 because 3/5 + 2/5 = 5/5
change the 2/5 into decimals by 2 ÷ 5 = 0.4
multiply $55 with 0.4
55 x 0.4 = 22
so she ends up saving $22
I think it is 2.6 seconds