mathématiques 4/7x = 9/14 équations

x in (-oo:+oo)

(2/3)*x-((4/7)*x)+4/7 = 9/14 // - 9/14

(2/3)*x-((4/7)*x)+4/7-(9/14) = 0

(2/3)*x+(-4/7)*x+4/7-9/14 = 0

2/21*x-1/14 = 0 // + 1/14

2/21*x = 1/14 // : 2/21

x = 1/14/2/21

x = 3/4

x = 3/4