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5x+8=13
5x=5
x=5/5
x=1
Verificar:
3(1+2)+2(1+1)=13
3(3)+2(2)=13
9+4=13
13=13
listo!!!
3x + 6 + 2x + 2 = 13
3x + 2x + 6 + 2 = 13
5x + 8 = 13
5x = 13 - 8
5x = 5
x = 5/5
x = 1
Solución :
x = 1
COMPROBAMOS :
3 (x + 2) + 2 (x + 1) = 13
3 (1 + 2) + 2 (1 + 1) = 13
3 (3) + 2 (2) = 13
9 + 4 = 13
13 = 13
Listo. La solución es correcta.