Value of people so that the expression 3(4+n) is equipment to 3(n+p) ​

3(n+p) = 3(4+n)
3n+3p = 12+3n
3p=12
p=4

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post