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Emily
Emily

Secondary 1 chevron_right Maths chevron_right Malaysia

Y=19-3___
What should put behind the 3?
3后面应该放什么?

Date Posted: 2 weeks ago
Views: 15
Eric Nicholas K
Eric Nicholas K
2 weeks ago
By the way, you have a mistake in the working.

4x - 19 + 3x = 30
7x = 49 (NOT x = 49)

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Eric Nicholas K
Eric Nicholas K's answer
2266 answers (Tutor Details)
1st
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.