Solve this system of equations using the substitution method.
y=3x-13
2x+4y=4

James adds two numbers a + b. sally adds the same two numbers but reverse the order b + a what property of addition assures us that james and sally will get the same sum

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).