Answer:
5
Step-by-step explanation:
28 - 12 = 16
28 / 35 = 16 / 4x
28 = 4 * 7
35 = 5 * 7
16 = 4 * 4
4x = 4 * x
( 4 * 7 ) / ( 5 * 7 ) = ( 4 * 4 ) / ( 4 * x )
( 4 / 5 ) = ( 4 / x )
Cross multiply,
4 * x = 5 * 4
Divide 4 on both sides,
x = 5
