Calcule as equaçoes do primeiro grau passo a passo :
a - 9n+37=40 ?
B- 2x+7=4x+5 ?
C- n + 2 + n
--- --- ?
3 5
a - 9n+37=40 ?
B- 2x+7=4x+5 ?
C- n + 2 + n
--- --- ?
3 5
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9n+37= 40
n= -40+37
n=-3
2x+7= 4x+5
2x-4x=-7+5
-2x= -2
x= -2-2 x= -4