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x=−3 and y=−7

Step-by-step explanation: 2x−3y=15 −2x+y=−1

−2x+y+2x=−1+2x (Add 2x to both sides)

y=2x−1

(Substitute 2x−1 for y in 2x−3y=15):

2x−3y=15

2x−3(2x−1)=15

−4x+3=15 (Simplify both sides of the equation)

−4x+3+−3=15+−3 (Add -3 to both sides)

−4x=12

−4x /−4

= 12 /−4  (Divide both sides by -4)

x=−3

(Substitute−3 for x in y 2x−1):

y=2x−1

y=(2)(−3)−1

y=−7 (Simplify both sides of the equation)

x=−3 and y=−7

a.   since the profit made in 2012 is equal to the profit made in 2014, the profit is symmetric about the line y = 120,000.

step-by-step explanation:

6 spoons of sugar for every 21 cups of flour

step-by-step explanation: