Solve each system by substitution. 1) y = 7x - 18 8x + 3y = 4 2) y = 3x + 2 5x + 5y = 10 3) -3x - 2y = 5 y = 3.x + 11 4) y = 4x + 19 5x - 4y=-10

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).

Rosy waxes 2/3 of her car with 1/4 bottle of car wax. at this rate, what fraction of the bottle of car wax will rosey use to wax her entire car

What expression is equivalent to (84+16)