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4x-y=63 3y+x=6 Line up the like terms in both equations: 4x-y=63 x+3
4x-y=63 3y+x=6 Line up the like terms in both equations: 4x-y=63 x+3
游客
2024-01-12
22
管理
问题
4x-y=63 3y+x=6
选项
答案
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
解析
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