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Y=19-3___
What should put behind the 3?
3后面应该放什么？
Date Posted: 4 years ago
Views: 996
By the way, you have a mistake in the working.
4x - 19 + 3x = 30
7x = 49 (NOT x = 49)
4x - 19 + 3x = 30
7x = 49 (NOT x = 49)
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done
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We use the found value of x and replace x by this value in the third equation.
At the end, remember to check that your found values of x and y fit nicely into BOTH equations.
I have corrected your working accordingly.
At the end, remember to check that your found values of x and y fit nicely into BOTH equations.
I have corrected your working accordingly.
Date Posted:
4 years ago
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