Answer:
probably the 20th day because 20 is the lowest common multiple 4 and 5 share.
9/2
Step-by-step explanation:
f(x)=4+20+4
=28
x=-1
2x+3/4(4x+16)=7
2x+(3x12)=7--->distributive property
2x+3x+12=7
5x+12=7--->addition property
5x=-5--->subtraction peroperty
x= -1---?division property