if (4x+3y):(3x+5Y) = 6:7 then please find X if y=10

Answer 1

(4x+3y):(3x+5Y) = 6:7
(4x+3y) / (3x+5Y) = 6/7
28x + 21y = 18x + 30y
10x = 9y
substitute y = 10 and solve for x