Question

If (2m,m-1)is a solution of 2x+3y-9=0 find m

Answer 1

2(2m)+3(m-1)-9=0
4m+3m-3-9=0
m=12/7

Answer 2

(2m,m-1)
x = 2m
y = m-1
2x + 3y - 9 = 0
2 × 2m + 3(m-1) = 9
4m + 3m - 3 = 9
7m = 12
m = 12/7
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