(6x + 3y = -8
1-2x – 3y = 4

The answer is 10. and if you go by pemdas you would 1. multiplication 2. division 3. addition 4. subtraction

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

The correct answer is $90