3. Solve x and y
(1) `3x + 12y = 0`
(2) `x-3y = 10`
Hint
Answer
`x=-10/7`
`y=40/7`
Show Steps
Form equation (1) we get
`=>3x = -12y`
`=>x = -4y`
substitute `x` to equation (2):
`=> -4y-3y=10`
`=> -7y=10`
`=> color(red)(y = -10/7)`
Solve x:
`=> x = -10/7times(-4)`
`=> color(red)(x = 40/7)`
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