Question

calcule o valor de X em cada triângulo

Answer 1

a)10,5/x=2.10,5/14,7+x
10,5/x=21/14,7+x
10,5(14,7+x)=21x
147,35+10,5x=21x
147,35=21x -10,5x
147,35=10,5x
147,35/10,5=x
x=14,7

b)4/7=x/21
21.4=7x
84=7x
84/7=x
x=12

c)7/7=18/2x
7.2x=18.7
14x=126
x=126/14
x=9