Respuesta :

MegantheTurtle
4/5x - 2 + 1/10x = 7
4/5x + 1/10x = 9
8x + x = 90
9x = 90
x = 10

Answer: the answer is 10


Step-by-step explanation:

x in (-oo:+oo)


(4/5)*x+(1/10)*x-2 = 7 // - 7


(4/5)*x+(1/10)*x-7-2 = 0


9/10*x-9 = 0 // + 9


9/10*x = 9 // : 9/10


x = 9/9/10


x = 10


x = 10