Answer:
i.) x=4 and y=8
ii.) x=9 and y=4
iii.) x=4 and y=9
b.) -36
Explanation:
i.)
Since the coefficient of x is 2 times greater then that of y, we know that the value of y must be 2 times greater than x so that they total 0. This means that x=4 and y=8.
4x - 2y = 0
4(4) - 2(8) = 0
16 - 16 = 0
0 = 0
ii.)
To make the equation the greatest value possible, you want x to be the greatest value possible and for y to be the least possible value, so the least amount is subtracted. This will mean that x=9 and y=4.
3x - 2y
3(9) - 2(4)
27 - 8
19
iii.)
To make the equation the least value possible, you want x to be the smallest value possible and for x to be the greatest possible value, so the most amount is subtracted. This will mean that x=4 and y=9.
3x - 2y
3(4) - 2(9)
12 - 18
-6
b.)
4 ( a - 3b )
4 ( -8 - 3(1/3) )
4 ( -8 - 1 )
4 ( -9 )
-36
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