Question

9(2x-3y)-8(y-x) и ещё 7(4-3x)-(8,5-x)=4-3(x-8)

Answer 1

1) решение:
1.18х-27у-8у+8х
18х+8х-27у-8у=26-х35у
2) решение:
28-21х-8,5х=4-3х+24
28-29.5х=28-3х
-29.5х=-3х
-29,5х+3х=0
-26,5х=0
х=0

Answer 2

Let's simplify each expression one by one:

9(2x - 3y) - 8(y - x) = 18x - 27y - 8y + 8x // Distribute the 9 and -8 = 26x - 35y // Combine like terms

7(4 - 3x) - (8.5 - x) = 4 - 3(x - 8) = 28 - 21x - 8.5 + x // Distribute the 7 and simplify the parenthesis on the left side = 19.5 - 20x // Combine like terms on the left side

So the simplified expressions are:

26x - 35y and 19.5 - 20x

Note that these two expressions cannot be combined further since they have different variables.