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4x - y = 63 3y + x = 6x=15y=-3Line up the like terms in both equations:4x - y
4x - y = 63 3y + x = 6x=15y=-3Line up the like terms in both equations:4x - y
游客
2025-02-24
9
管理
问题
4x - y = 63 3y + x = 6
选项
答案
x=15
y=-3
解析
Line up the like terms in both equations:
4x - y = 63
x + 3y = 6
Multiply the top equation by 3 and add the equations:
12x - 3y = 189
x + 3y = 6
Note that the y terms cancel out:
13x = 195
x = 15
Now substitute 15 for x in one of the equations.
x + 3y = 6
15 + 3y= 6
3y= -9
y=-3
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