Which properties were used to prove that the expressions 7x+4-X-2 and 6x+2 are equivalent? 7X+4-x-2
7X-X+4-2
(7-1)x+4-2
6x+ 2

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