What is the solution to this system of linear equations?x + y = 4x − y = 6

x+y=4x-y=6

x+y=6
4x-y=6
We add them to eliminate y
5x=12
5x/5=12/5
x=12/5
Substitute the value of x
12/5+y=6
y=18/5

(x, y)=(12/5, 18/5)

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