This is missing a parenthesis somewhere...
If we think about this:
# + 5 = 7
# = 2
Can 3(-1 7/8) = 2? No, since it is a decimal!
FALSE!
Think about what it means to multiply 5.4 by 2.5 and 10^2 by 10^9.
I think I see an optical illusion in your first picture on the post. If you look at the top right where there is black, it looks like the black is closing in on the paper and is slowly taking over the white part.
Just lots of adding and subtracting. Take it step by step by starting from left to right.
-20 - 15 = -35
-35 - 12 = ?
OR
you could start cancelling opposite terms like + 15 and - 15 and end up with the answer faster.
$$Like\; 3\frac{3}{4} \div 4\frac{2}{3} \div 5\frac{1}{6}?$$
Sure, it would be good to check.
Are you sure all your answers to the questions are right?
I see. That's interesting! Well, perception is different.
6y - 1.5x = 8
Move over all non y terms to the right:
6y = 1.5x + 8
Divide both sides by 6:
y = 1.5/6*x + 8/6
Note: 1.5/6 = 3/2 / 6 = 3/2 * 1/6 = 3/12 = 1/4.
8/6 --> 4/3.
y = (1/4)x + 4/3.
