Question

3x+4+2x+1 para x=5,o perimetro desse retangulo e igual a?

Answer 1

3.5 = 15
2.5 = 10
__________
3.15 = 45
2.10 = 20
__________
 45 + 4 + 20 + 1 = 70

Answer 2

3x+4+2x+1

3.5+4+2.5+1

15+4+10+1

30