0_0_39037774_21308.cpp: In function 'int main()': 0_0_39037774_21308.cpp:10:25: error: 'x' was not declared in this scope 10 | x=3*z-m+2*n; | ^ 0_0_39037774_21308.cpp:11:25: error: 'y' was not declared in this scope 11 | y=m-n-4*z; | ^