Hello,
I suppose equations are:
x+y=3 (1)
x+2y=9 (2)
(2)-(1)==>y=6
(1)==>x=3-6
x=-3, y=6
Sol={(-3,6)}
Answer:
Question #1 It is three dollars of so the cost is $12
Question #2 The answer is 6
Question #3 21.25
Step-by-step explanation:
Answer:
C. II only
Step-by-step explanation:
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2 x -6 equals 0. add 6 to both sides. divide both sides by two. x equals 3