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Can anyone solve x plus 4y equals 7 and x plus y equals 4 as a simultaneous equation and show their working?
S3anst3r2010
x+4y = 7
x+y = 4
Subtract the second equation from the first equation:
3y = 3
Divide both sides by 3 in order to find the value of y:
y = 1
Substitute the value of y into both original equations in order to find the value of x:
Therefore it follows that: x = 3 and y = 1
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∙ 12y ago
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