SAT数学-方程 Example 21

发布于 2015-08-03  84 次阅读

Question 1
mx+py=10
(m+1)x+py=14
Based on the equations above, which of the following must be true?
A
x=2
B
x=4
C
y=6
D
y=8
E
y-x=2
Question 1 Explanation: 
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