Question

sabe-seque 2x+3y=7. se x=2m+1 e y = m -3 determine o valor de m

Answer 1

2x+3y=7   x=2m+1   y = m -3

2(2m + 1) + 3(m-3) = 7
4m + 2 + 3m - 9 = 7
7m = 7 - 2 + 9
7m = 14
m = 14 / 7
m = 2
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Answer 2

 2x+3y=7. se x=2m+1 e y = m -3 determine o valor de m

 2(2m + 1 ) + 3(m - 3 ) = 7

4m + 2 + 3m - 9 = 7 ==> 7m = 7 + 9 - 2 

7m = 7 + 7 ==> 7m = 14 ==> m = 2