Question

determina nr nat x din :23-2•[15-(74-2•x):4+3]=9

Answer 1

23-2•[15-(74-2•x):4+3]=9

[15-(74-2•x):4+3]=9+(23-2)
[15-(74-2•x):4+3]=30
(74-2•x):4+3=30+15(74-2•x):4+3=45
(74-2•x):4=45+3
(74-2•x):4=48
(74-2•x)=48/4
(74-2•x)=12
2•x=74-12
2•x=62
x=62/2
x=31