It should be 2 ..............
The first column. The rule for that column is y = x * -4.
0.5(y + 3.3)
The product of 0.5 and the sum of y and 3.3.
0.5 times the sum of y and 3.3
What you have to do is multiply 21 by 2. it is 42. $42 dollars was the original price of the bookcase.
3x - y = -4
3x - (-10) = -4 Substitute
3x + 10 = -4 Simplify
3x = -14 Separate numbers and variables
x = -14/3 Divide
2x - y = - 10
2x - (-10) = -10 Substitute
2x + 10 = -10 Simplify
2x = -20 Separate numbers and variables
x = -10 Divide
