Respuesta :
(2 x + 1):15=(x-1):7
7(2x+1)=15(x-1)
14x+7=15x-15
14x-15x=-15-7
-x=-22
x=22
7(2x+1)=15(x-1)
14x+7=15x-15
14x-15x=-15-7
-x=-22
x=22
Answer:
x=22
Step-by-step explanation:
They are put in ratio form so
[tex] \frac{2x + 1}{15} = \frac{x - 1}{7} [/tex]
so crisscross them
7 (2x+1)=15 (x-1)
14x+7=15x-15(collect the like terms)
14x-15x=-15-7
-x=-22 (divide both sides by -1 to find x)
x=22