Page 25 - E booklet prep 3 bader 2025 b_Neat

Second case:

If ?? = ?????????????? as : ?? = ??

?? ?????????????? ?? ??

Then ?? = ???? ?????? ?? = ???? ?????????? ?? ? ??*

Example 1:

If ?? = ?? ????+????
?? ??
find the value of the ratio ????-??

X = 2m , y = 3m

????+???? = ???? ?? = ??
??????-???? ?????? ??

Example 2:

If ?? = ?? find the value of 7a + 9b : 4a + 2b
?? ??

a = 3m , b = 5m

??????+?????? = ???? ?? = 3
??????+?????? ??????

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