Question

{ }+{ }=9 + + { }-{ }=6 = = 10 10

Answer 1

Ответ:

a=1.5,b=7.5,c=8.5,d=2.5

можно составить систему из 4 уравнений

a+b=9

c-d=6

a+c=10 (вертикальный первый)

b+d=10 (вертикальный второй)

тогда

a+b+c+d=20, а+b=9 значит

9+c+d=20,c+d=11

получаем систему из двух уравнений

c+d=11

c-d=6

отсюда 2с=17,с=8.5

8.5-d=6, d=2.5

a+c=10, a+8.5=10,a=1.5

b+d=10, b+2.5=10,b=7.5

Answer 2

It seems like you have written a sequence of equations using braces and plus/minus signs. However, the notation you provided is not clear, and it's not standard mathematical notation. To properly evaluate and understand these equations, we need to clarify the meaning of the symbols you used.

In standard mathematical notation, equations are usually written in a clear and unambiguous way, using numbers, variables, operators (+, -, *, /), and parentheses to indicate the order of operations.

If you can provide more context or clarify the meaning of the symbols you used, I'd be happy to help you solve the equations or answer any questions you have.